虽然vue3已经出来很久了,但我觉得vue.js的源码还是非常值得去学习一下。vue.js里面封装的很多工具类在我们平时工作项目中也会经常用到。所以我近期会对vue.js的源码进行解读,分享值得去学习的代码片段,这篇文章将会持续更新。
一、1200~2400代码有哪些内容?:
1.一系列合并策略: ①选项 el、propsData 的合并策略 strats.el ,strats.propsData ②选项data的合并策略 strats.data ③生命周期钩子选项的合并策略 mergeHoo ④资源(assets)选项的合并策略 mergeAssets ⑤选项 watch 的合并策略 strats.watch ⑥选项 props、methods、inject、computed 的合并策略 strats.props,strats.methods ,strats.inject , strats.computed,都是使用相同的合并策略函数 ⑦provide 的合并策略,与data的合并策略相同 strats.provide ⑧合并策略函数 mergeOptions 2.一些属性的校验和规范化 ①validateComponentName:组件名的校验 ②normalizeProps:对props的属性规范化 ③normalizeInject:对inject的属性规范化 ④normalizeDirectives:对directives的属性规范化 3.一些警告信息,异常捕获,异常处理等
二.1200~2400行代码的重点:
nextTick核心源码 1.nextTick会优先使用microTask(微任务), 其次是macroTask(宏任务),MutationObserver是nextTick的核心,MutationObserver接口提供了监视对DOM树所做更改的能力,MutationObserver也是微任务,所以面试的时候如果面试官问有哪些微任务,如果能答到MutationObserver是不是非常加分呢? 2.vue项目中如果需要获取修改后的dom信息,需要通过nextTick在dom更新任务之后创建一个异步任务,也就是官网所说的:nextTick会在下次 DOM 更新循环结束之后执行延迟回调.
三、1200~2400行的代码解读:
function del (target, key) {
if (isUndef(target) || isPrimitive(target)
) {
warn(("Cannot delete reactive property on undefined, null, or primitive value: " + ((target))));
}
if (Array.isArray(target) && isValidArrayIndex(key)) {
target.splice(key, 1);
return
}
var ob = (target).__ob__;
if (target._isVue || (ob && ob.vmCount)) {
warn(
'Avoid deleting properties on a Vue instance or its root $data ' +
'- just set it to null.'
);
return
}
if (!hasOwn(target, key)) {
return
}
delete target[key];
if (!ob) {
return
}
ob.dep.notify();
}
function dependArray (value) {
for (var e = (void 0), i = 0, l = value.length; i < l; i++) {
e = value[i];
e && e.__ob__ && e.__ob__.dep.depend();
if (Array.isArray(e)) {
dependArray(e);
}
}
}
var strats = config.optionMergeStrategies
{
strats.el = strats.propsData = function (parent, child, vm, key) {
if (!vm) {
warn(
"option \"" + key + "\" can only be used during instance " +
'creation with the `new` keyword.'
);
}
return defaultStrat(parent, child)
};
}
function mergeData (to, from) {
if (!from) { return to }
var key, toVal, fromVal;
var keys = hasSymbol
? Reflect.ownKeys(from)
: Object.keys(from);
for (var i = 0; i < keys.length; i++) {
key = keys[i];
if (key === '__ob__') { continue }
toVal = to[key];
fromVal = from[key];
if (!hasOwn(to, key)) {
set(to, key, fromVal);
} else if (
toVal !== fromVal &&
isPlainObject(toVal) &&
isPlainObject(fromVal)
) {
mergeData(toVal, fromVal);
}
}
return to
}
function mergeDataOrFn (
parentVal,
childVal,
vm
) {
if (!vm) {
if (!childVal) {
return parentVal
}
if (!parentVal) {
return childVal
}
return function mergedDataFn () {
return mergeData(
typeof childVal === 'function' ? childVal.call(this, this) : childVal,
typeof parentVal === 'function' ? parentVal.call(this, this) : parentVal
)
}
} else {
return function mergedInstanceDataFn () {
var instanceData = typeof childVal === 'function'
? childVal.call(vm, vm)
: childVal;
var defaultData = typeof parentVal === 'function'
? parentVal.call(vm, vm)
: parentVal;
if (instanceData) {
return mergeData(instanceData, defaultData)
} else {
return defaultData
}
}
}
}
strats.data = function (
parentVal,
childVal,
vm
) {
if (!vm) {
if (childVal && typeof childVal !== 'function') {
warn(
'The "data" option should be a function ' +
'that returns a per-instance value in component ' +
'definitions.',
vm
);
return parentVal
}
return mergeDataOrFn(parentVal, childVal)
}
return mergeDataOrFn(parentVal, childVal, vm)
};
function mergeHook (
parentVal,
childVal
) {
var res = childVal
? parentVal
? parentVal.concat(childVal)
: Array.isArray(childVal)
? childVal
: [childVal]
: parentVal;
return res
? dedupeHooks(res)
: res
}
function dedupeHooks (hooks) {
var res = [];
for (var i = 0; i < hooks.length; i++) {
if (res.indexOf(hooks[i]) === -1) {
res.push(hooks[i]);
}
}
return res
}
LIFECYCLE_HOOKS.forEach(function (hook) {
strats[hook] = mergeHook;
});
function mergeAssets (
parentVal,
childVal,
vm,
key
) {
创建parentVal新对象
var res = Object.create(parentVal || null);
if (childVal) {
assertObjectType(key, childVal, vm);
return extend(res, childVal)
} else {
return res
}
}
ASSET_TYPES.forEach(function (type) {
strats[type + 's'] = mergeAssets;
});
strats.watch = function (
parentVal,
childVal,
vm,
key
) {
if (parentVal === nativeWatch) { parentVal = undefined; }
if (childVal === nativeWatch) { childVal = undefined; }
if (!childVal) { return Object.create(parentVal || null) }
{
assertObjectType(key, childVal, vm);
}
if (!parentVal) { return childVal }
var ret = {};
extend(ret, parentVal);
for (var key$1 in childVal) {
var parent = ret[key$1];
var child = childVal[key$1];
if (parent && !Array.isArray(parent)) {
parent = [parent];
}
ret[key$1] = parent
? parent.concat(child)
: Array.isArray(child) ? child : [child];
}
return ret
};
strats.props =
strats.methods =
strats.inject =
strats.computed = function (
parentVal,
childVal,
vm,
key
) {
if (childVal && "development" !== 'production') {
assertObjectType(key, childVal, vm);
}
if (!parentVal) { return childVal }
var ret = Object.create(null);
extend(ret, parentVal);
if (childVal) { extend(ret, childVal); }
return ret
};
strats.provide = mergeDataOrFn;
var defaultStrat = function (parentVal, childVal) {
return childVal === undefined
? parentVal
: childVal
};
function checkComponents (options) {
for (var key in options.components) {
validateComponentName(key);
}
}
function validateComponentName (name) {
if (!new RegExp(("^[a-zA-Z][\\-\\.0-9_" + (unicodeRegExp.source) + "]*$")).test(name)) {
warn(
'Invalid component name: "' + name + '". Component names ' +
'should conform to valid custom element name in html5 specification.'
);
}
if (isBuiltInTag(name) || config.isReservedTag(name)) {
warn(
'Do not use built-in or reserved HTML elements as component ' +
'id: ' + name
);
}
}
function normalizeProps (options, vm) {
var props = options.props;
if (!props) { return }
var res = {};
var i, val, name;
if (Array.isArray(props)) {
i = props.length;
while (i--) {
val = props[i];
if (typeof val === 'string') {
name = camelize(val);
res[name] = { type: null };
} else {
warn('props must be strings when using array syntax.');
}
}
} else if (isPlainObject(props)) {
for (var key in props) {
val = props[key];
name = camelize(key);
res[name] = isPlainObject(val)
? val
: { type: val };
}
} else {
warn(
"Invalid value for option \"props\": expected an Array or an Object, " +
"but got " + (toRawType(props)) + ".",
vm
);
}
options.props = res;
}
function normalizeInject (options, vm) {
var inject = options.inject;
if (!inject) { return }
var normalized = options.inject = {};
if (Array.isArray(inject)) {
for (var i = 0; i < inject.length; i++) {
normalized[inject[i]] = { from: inject[i] };
}
} else if (isPlainObject(inject)) {
for (var key in inject) {
var val = inject[key];
normalized[key] = isPlainObject(val)
? extend({ from: key }, val)
: { from: val };
}
} else {
warn(
"Invalid value for option \"inject\": expected an Array or an Object, " +
"but got " + (toRawType(inject)) + ".",
vm
);
}
}
function normalizeDirectives (options) {
var dirs = options.directives;
if (dirs) {
for (var key in dirs) {
var def$$1 = dirs[key];
if (typeof def$$1 === 'function') {
dirs[key] = { bind: def$$1, update: def$$1 };
}
}
}
}
function assertObjectType (name, value, vm) {
if (!isPlainObject(value)) {
warn(
"Invalid value for option \"" + name + "\": expected an Object, " +
"but got " + (toRawType(value)) + ".",
vm
);
}
}
function mergeOptions (
parent,
child,
vm
) {
{
checkComponents(child);
}
if (typeof child === 'function') {
child = child.options;
}
normalizeProps(child, vm);
normalize(child, vm);
normalizeDirectives(child);
if (!child._base) {
if (child.extends) {
parent = mergeOptions(parent, child.extends, vm);
}
if (child.mixins) {
for (var i = 0, l = child.mixins.length; i < l; i++) {
parent = mergeOptions(parent, child.mixins[i], vm);
}
}
}
var options = {};
var key;
for (key in parent) {
mergeField(key);
}
for (key in child) {
if (!hasOwn(parent, key)) {
mergeField(key);
}
}
function mergeField (key) {
var strat = strats[key] || defaultStrat;
options[key] = strat(parent[key], child[key], vm, key);
}
return options
}
function resolveAsset (
options,
type,
id,
warnMissing
) {
if (typeof id !== 'string') {
return
}
var assets = options[type];
if (hasOwn(assets, id)) { return assets[id] }
var camelizedId = camelize(id);
if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
var PascalCaseId = capitalize(camelizedId);
if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
if (warnMissing && !res) {
warn(
'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
options
);
}
return res
}
function validateProp (
key,
propOptions,
propsData,
vm
) {
var prop = propOptions[key];
var absent = !hasOwn(propsData, key);
var value = propsData[key];
var booleanIndex = getTypeIndex(Boolean, prop.type);
if (booleanIndex > -1) {
if (absent && !hasOwn(prop, 'default')) {
value = false;
} else if (value === '' || value === hyphenate(key)) {
var stringIndex = getTypeIndex(String, prop.type);
if (stringIndex < 0 || booleanIndex < stringIndex) {
value = true;
}
}
}
if (value === undefined) {
value = getPropDefaultValue(vm, prop, key);
var prevShouldObserve = shouldObserve;
toggleObserving(true);
observe(value);
toggleObserving(prevShouldObserve);
}
{
assertProp(prop, key, value, vm, absent);
}
return value
}
function getPropDefaultValue (vm, prop, key) {
if (!hasOwn(prop, 'default')) {
return undefined
}
var def = prop.default;
if (isObject(def)) {
warn(
'Invalid default value for prop "' + key + '": ' +
'Props with type Object/Array must use a factory function ' +
'to return the default value.',
vm
);
}
if (vm && vm.$options.propsData &&
vm.$options.propsData[key] === undefined &&
vm._props[key] !== undefined
) {
return vm._props[key]
}
return typeof def === 'function' && getType(prop.type) !== 'Function'
? def.call(vm)
: def
}
function assertProp (
prop,
name,
value,
vm,
absent
) {
if (prop.required && absent) {
warn(
'Missing required prop: "' + name + '"',
vm
);
return
}
if (value == null && !prop.required) {
return
}
var type = prop.type;
var valid = !type || type === true;
var expectedTypes = [];
if (type) {
if (!Array.isArray(type)) {
type = [type];
}
for (var i = 0; i < type.length && !valid; i++) {
var assertedType = assertType(value, type[i], vm);
expectedTypes.push(assertedType.expectedType || '');
valid = assertedType.valid;
}
}
var haveExpectedTypes = expectedTypes.some(function (t) { return t; });
if (!valid && haveExpectedTypes) {
warn(
getInvalidTypeMessage(name, value, expectedTypes),
vm
);
return
}
var validator = prop.validator;
if (validator) {
if (!validator(value)) {
warn(
'Invalid prop: custom validator check failed for prop "' + name + '".',
vm
);
}
}
}
var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol|BigInt)$/;
function assertType (value, type, vm) {
var valid;
var expectedType = getType(type);
if (simpleCheckRE.test(expectedType)) {
var t = typeof value;
valid = t === expectedType.toLowerCase();
if (!valid && t === 'object') {
valid = value instanceof type;
}
} else if (expectedType === 'Object') {
valid = isPlainObject(value);
} else if (expectedType === 'Array') {
valid = Array.isArray(value);
} else {
try {
valid = value instanceof type;
} catch (e) {
warn('Invalid prop type: "' + String(type) + '" is not a constructor', vm);
valid = false;
}
}
return {
valid: valid,
expectedType: expectedType
}
}
var functionTypeCheckRE = /^\s*function (\w+)/;
function getType (fn) {
var match = fn && fn.toString().match(functionTypeCheckRE);
return match ? match[1] : ''
}
function isSameType (a, b) {
return getType(a) === getType(b)
}
function getTypeIndex (type, expectedTypes) {
if (!Array.isArray(expectedTypes)) {
return isSameType(expectedTypes, type) ? 0 : -1
}
for (var i = 0, len = expectedTypes.length; i < len; i++) {
if (isSameType(expectedTypes[i], type)) {
return i
}
}
return -1
}
function getInvalidTypeMessage (name, value, expectedTypes) {
var message = "Invalid prop: type check failed for prop \"" + name + "\"." +
" Expected " + (expectedTypes.map(capitalize).join(', '));
var expectedType = expectedTypes[0];
var receivedType = toRawType(value);
if (
expectedTypes.length === 1 &&
isExplicable(expectedType) &&
isExplicable(typeof value) &&
!isBoolean(expectedType, receivedType)
) {
message += " with value " + (styleValue(value, expectedType));
}
message += ", got " + receivedType + " ";
if (isExplicable(receivedType)) {
message += "with value " + (styleValue(value, receivedType)) + ".";
}
return message
}
function styleValue (value, type) {
if (type === 'String') {
return ("\"" + value + "\"")
} else if (type === 'Number') {
return ("" + (Number(value)))
} else {
return ("" + value)
}
}
var EXPLICABLE_TYPES = ['string', 'number', 'boolean'];
function isExplicable (value) {
return EXPLICABLE_TYPES.some(function (elem) { return value.toLowerCase() === elem; })
}
function isBoolean () {
var args = [], len = arguments.length;
while ( len-- ) args[ len ] = arguments[ len ];
return args.some(function (elem) { return elem.toLowerCase() === 'boolean'; })
}
function handleError (err, vm, info) {
pushTarget();
try {
if (vm) {
var cur = vm;
while ((cur = cur.$parent)) {
var hooks = cur.$options.errorCaptured;
if (hooks) {
for (var i = 0; i < hooks.length; i++) {
try {
var capture = hooks[i].call(cur, err, vm, info) === false;
if (capture) { return }
} catch (e) {
globalHandleError(e, cur, 'errorCaptured hook');
}
}
}
}
}
globalHandleError(err, vm, info);
} finally {
popTarget();
}
}
function invokeWithErrorHandling (
handler,
context,
args,
vm,
info
) {
var res;
try {
res = args ? handler.apply(context, args) : handler.call(context);
if (res && !res._isVue && isPromise(res) && !res._handled) {
res.catch(function (e) { return handleError(e, vm, info + " (Promise/async)"); });
res._handled = true;
}
} catch (e) {
handleError(e, vm, info);
}
return res
}
function globalHandleError (err, vm, info) {
if (config.errorHandler) {
try {
return config.errorHandler.call(null, err, vm, info)
} catch (e) {
if (e !== err) {
logError(e, null, 'config.errorHandler');
}
}
}
logError(err, vm, info);
}
function logError (err, vm, info) {
{
warn(("Error in " + info + ": \"" + (err.toString()) + "\""), vm);
}
if ((inBrowser || inWeex) && typeof console !== 'undefined') {
console.error(err);
} else {
throw err
}
}
var isUsingMicroTask = false;
var callbacks = [];
var pending = false;
function flushCallbacks () {
pending = false;
var copies = callbacks.slice(0);
callbacks.length = 0;
for (var i = 0; i < copies.length; i++) {
copies[i]();
}
}
var timerFunc;
if (typeof Promise !== 'undefined' && isNative(Promise)) {
var p = Promise.resolve();
timerFunc = function () {
p.then(flushCallbacks);
if (isIOS) { setTimeout(noop); }
};
isUsingMicroTask = true;
} else if (!isIE && typeof MutationObserver !== 'undefined' && (
isNative(MutationObserver) ||
MutationObserver.toString() === '[object MutationObserverConstructor]'
)) {
var counter = 1;
var observer = new MutationObserver(flushCallbacks);
var textNode = document.createTextNode(String(counter));
observer.observe(textNode, {
characterData: true
});
timerFunc = function () {
counter = (counter + 1) % 2;
textNode.data = String(counter);
};
isUsingMicroTask = true;
} else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
timerFunc = function () {
setImmediate(flushCallbacks);
};
} else {
timerFunc = function () {
setTimeout(flushCallbacks, 0);
};
}
function nextTick (cb, ctx) {
var _resolve;
callbacks.push(function () {
if (cb) {
try {
cb.call(ctx);
} catch (e) {
handleError(e, ctx, 'nextTick');
}
} else if (_resolve) {
_resolve(ctx);
}
});
if (!pending) {
pending = true;
timerFunc();
}
if (!cb && typeof Promise !== 'undefined') {
return new Promise(function (resolve) {
_resolve = resolve;
})
}
}
var mark;
var measure;
{
var perf = inBrowser && window.performance;
if (
perf &&
perf.mark &&
perf.measure &&
perf.clearMarks &&
perf.clearMeasures
) {
mark = function (tag) { return perf.mark(tag); };
measure = function (name, startTag, endTag) {
perf.measure(name, startTag, endTag);
perf.clearMarks(startTag);
perf.clearMarks(endTag);
};
}
}
var initProxy;
{
var allowedGlobals = makeMap(
'Infinity,undefined,NaN,isFinite,isNaN,' +
'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,BigInt,' +
'require'
);
var warnNonPresent = function (target, key) {
warn(
"Property or method \"" + key + "\" is not defined on the instance but " +
'referenced during render. Make sure that this property is reactive, ' +
'either in the data option, or for class-based components, by ' +
'initializing the property. ' +
'See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.',
target
);
};
var warnReservedPrefix = function (target, key) {
warn(
"Property \"" + key + "\" must be accessed with \"$data." + key + "\" because " +
'properties starting with "$" or "_" are not proxied in the Vue instance to ' +
'prevent conflicts with Vue internals. ' +
'See: https://vuejs.org/v2/api/#data',
target
);
};
var hasProxy =
typeof Proxy !== 'undefined' && isNative(Proxy);
if (hasProxy) {
var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
config.keyCodes = new Proxy(config.keyCodes, {
set: function set (target, key, value) {
if (isBuiltInModifier(key)) {
warn(("Avoid overwriting built-in modifier in config.keyCodes: ." + key));
return false
} else {
target[key] = value;
return true
}
}
});
}
var hasHandler = {
has: function has (target, key) {
var has = key in target;
var isAllowed = allowedGlobals(key) ||
(typeof key === 'string' && key.charAt(0) === '_' && !(key in target.$data));
if (!has && !isAllowed) {
if (key in target.$data) { warnReservedPrefix(target, key); }
else { warnNonPresent(target, key); }
}
return has || !isAllowed
}
};
var getHandler = {
get: function get (target, key) {
if (typeof key === 'string' && !(key in target)) {
if (key in target.$data) { warnReservedPrefix(target, key); }
else { warnNonPresent(target, key); }
}
return target[key]
}
};
initProxy = function initProxy (vm) {
if (hasProxy) {
var options = vm.$options;
var handlers = options.render && options.render._withStripped
? getHandler
: hasHandler;
vm._renderProxy = new Proxy(vm, handlers);
} else {
vm._renderProxy = vm;
}
};
}
var seenObjects = new _Set();
function traverse (val) {
_traverse(val, seenObjects);
seenObjects.clear();
}
function _traverse (val, seen) {
var i, keys;
var isA = Array.isArray(val);
if ((!isA && !isObject(val)) || Object.isFrozen(val) || val instanceof VNode) {
return
}
if (val.__ob__) {
var depId = val.__ob__.dep.id;
if (seen.has(depId)) {
return
}
seen.add(depId);
}
if (isA) {
i = val.length;
while (i--) { _traverse(val[i], seen); }
} else {
keys = Object.keys(val);
i = keys.length;
while (i--) { _traverse(val[keys[i]], seen); }
}
}
var normalizeEvent = cached(function (name) {
var passive = name.charAt(0) === '&';
name = passive ? name.slice(1) : name;
var once$$1 = name.charAt(0) === '~';
name = once$$1 ? name.slice(1) : name;
var capture = name.charAt(0) === '!';
name = capture ? name.slice(1) : name;
return {
name: name,
once: once$$1,
capture: capture,
passive: passive
}
});
function createFnInvoker (fns, vm) {
function invoker () {
var arguments$1 = arguments;
var fns = invoker.fns;
if (Array.isArray(fns)) {
var cloned = fns.slice();
for (var i = 0; i < cloned.length; i++) {
invokeWithErrorHandling(cloned[i], null, arguments$1, vm, "v-on handler");
}
} else {
return invokeWithErrorHandling(fns, null, arguments, vm, "v-on handler")
}
}
invoker.fns = fns;
return invoker
}
function updateListeners (
on,
oldOn,
add,
remove$$1,
createOnceHandler,
vm
) {
var name, def$$1, cur, old, event;
for (name in on) {
def$$1 = cur = on[name];
old = oldOn[name];
event = normalizeEvent(name);
if (isUndef(cur)) {
warn(
"Invalid handler for event \"" + (event.name) + "\": got " + String(cur),
vm
);
} else if (isUndef(old)) {
if (isUndef(cur.fns)) {
cur = on[name] = createFnInvoker(cur, vm);
}
if (isTrue(event.once)) {
cur = on[name] = createOnceHandler(event.name, cur, event.capture);
}
add(event.name, cur, event.capture, event.passive, event.params);
} else if (cur !== old) {
old.fns = cur;
on[name] = old;
}
}
for (name in oldOn) {
if (isUndef(on[name])) {
event = normalizeEvent(name);
remove$$1(event.name, oldOn[name], event.capture);
}
}
}
function mergeVNodeHook (def, hookKey, hook) {
if (def instanceof VNode) {
def = def.data.hook || (def.data.hook = {});
}
var invoker;
var oldHook = def[hookKey];
function wrappedHook () {
hook.apply(this, arguments);
remove(invoker.fns, wrappedHook);
}
if (isUndef(oldHook)) {
invoker = createFnInvoker([wrappedHook]);
} else {
if (isDef(oldHook.fns) && isTrue(oldHook.merged)) {
invoker = oldHook;
invoker.fns.push(wrappedHook);
} else {
invoker = createFnInvoker([oldHook, wrappedHook]);
}
}
invoker.merged = true;
def[hookKey] = invoker;
}
function extractPropsFromVNodeData (
data,
Ctor,
tag
) {
var propOptions = Ctor.options.props;
if (isUndef(propOptions)) {
return
}
var res = {};
var attrs = data.attrs;
var props = data.props;
if (isDef(attrs) || isDef(props)) {
for (var key in propOptions) {
var altKey = hyphenate(key);
{
var keyInLowerCase = key.toLowerCase();
if (
key !== keyInLowerCase &&
attrs && hasOwn(attrs, keyInLowerCase)
) {
tip(
"Prop \"" + keyInLowerCase + "\" is passed to component " +
(formatComponentName(tag || Ctor)) + ", but the declared prop name is" +
" \"" + key + "\". " +
"Note that HTML attributes are case-insensitive and camelCased " +
"props need to use their kebab-case equivalents when using in-DOM " +
"templates. You should probably use \"" + altKey + "\" instead of \"" + key + "\"."
);
}
}
checkProp(res, props, key, altKey, true) ||
checkProp(res, attrs, key, altKey, false);
}
}
return res
}
|