https://codepen.io/winkying/pen/jQrNpz?editors=1011 Steps to reproduce click the reproduction link and check the console panel What is expected? get the correct value What is actually happening? throw an error "Cannot convert a Symbol value to a string Justineoclosed this ascompletedNov 9, 2018
可以传入任意值,先调用String转成字符串,目的是防止传入的值为Symbol类型,那样直接调用parseFloat会报错,例如: lettest =Symbol('test');console.log(parseFloat(test)) 控制台捕获错误:UncaughtTypeError:Cannotconvert aSymbolvalue to a string 原因是在调用parseFloat时,内部会调用内置的ToString方法,可以参考这里。而...
控制台捕获错误:Uncaught TypeError: Cannot convert a Symbol value to a string 都是因为内部会调用内置的ToString方法造成的。 而如果手动调用toString方法或者调用String,转换为字符串,则不会报错: let test = Symbol('test'); console.log(test.toString()); // "Symbol(test)" console.log(String(test)) ...
、 我试图使用v绑定将一个对象传递给我的组件:我的对象是将符号用于其中的一些值: name: 'myCar',}Uncaught TypeError: Cannot convert a Symbol value to a string如果我将m 浏览6提问于2020-10-18得票数 1 回答已采纳 2回答 如何将过滤器文件导入main.js? 、 我尝试了下面的方法,但是我的linter一直抛出...
constget=/*#__PURE__*/createGetter()constset=/*#__PURE__*/createSetter()functiondeleteProperty(target:object,key:string|symbol):boolean{consthadKey=hasOwn(target,key)constoldValue=(targetasany)[key]constresult=Reflect.deleteProperty(target,key)if(result&&hadKey){trigger(target,TriggerOpTypes.DE...
-100n // -100n +100n // Uncaught TypeError: Cannot convert a BigInt value to a number 1. 2. 2、string.prototype.matchAll() 如果您运行谷歌搜索JavaScript string match all,第一个结果将是这样的:如何编写正则表达式“match all”? 最佳结果将建议 String.match 与正则表达式和/g 一起使用或者带有...
object, key: string | symbol, value: unknown, receiver: object ): boolean { let oldValue = (target as any)[key] // 首先把老值取出来,没有则undefined if (!shallow) { // 如果不是浅监听 value = toRaw(value) oldValue = toRaw(oldValue) if (!isArray(target) && isRef(oldValue) &&...
function createSetter(shallow = false) { return function set( target: object, key: string | symbol, value: unknown, receiver: object ): boolean { let oldValue = (target as any)[key] if (!shallow) { value = toRaw(value) oldValue = toRaw(oldValue) if (!isArray(target) && isRef(...
Map Token is a gradient variable derived from Seed. It is recommended to implement custom Map Token through theme.algorithm, which can ensure the gradient relationship between Map Tokens. It can also be overridden by theme.token to modify the value of some map tokens individually. ...
reactive(value) : value 它有两个私有属性_value和_rawValue,两个公有字段dep和__v_isRef,其中__v_isRef只读。 constructor中根据__v_isShallow表示是否是浅(shallow)跟踪,浅也就是不做响应式处理,不去跟踪数据变化。 toRaw:就是标记这个数据为ReactiveFlags.RAW,也就是__v_raw。这个ReactiveFlags我们之前...