javascript let str = "Hello, world!"; console.log(str.includes("world")); // 输出: true 如果尝试在非数组或非字符串上调用includes,比如一个对象或者null/undefined,将会抛出“is not a function”的错误。 确认JavaScript环境或浏览器支持: includes方法在ES6(ECMAScript 2015)中被引入。确保你的JavaScr...
actionList); let values = binding.value; let hasPermission = actionList.includes(values); if (!hasPermission) { el.style = 'display:none'; setTimeout(() => { el.parentNode.removeChild(el); }, 0); } }, });
Javascript error: keepassxc-browser.js:1269 Uncaught TypeError: target.className.includes is not a function at Object.cipObserverHelper.ignoredElement (keepassxc-browser.js:1269) at Object.cipObserverHelper.handleObserverRemove (keepassxc-browser.js:1302) at MutationObserver.<anonymous> (keepassxc-browse...
Object.defineProperty(Array.prototype,'includes', { value:function(searchElement, fromIndex) { // 1. Let O be ? ToObject(this value). if(this==null) { thrownewTypeError('"this" is null or not defined'); } varo = Object(this); // 2. Let len be ? ToLength(? Get(O, "length")...
ToObject(this value).if(this==null){thrownewTypeError('"this" is null or not defined');}varo...
TypeError: Raised when the type of a variable is not as expected. URIError: Raised when the encodeURI() or decodeURI() functions are used in an incorrect manner. 可以使用Error.name属性获取以上错误类型。如下代码: function captureErrorType(error) { ...
问尝试过滤产品列表时，React "TypeError: product.name.includes(...).map is not a function“EN...
在JavaScript中,includes 方法用于判断一个数组是否包含一个特定的值,或者一个字符串是否包含另一个字符串。这个方法返回一个布尔值,表示是否找到了指定的元素或子字符串。 基础概念 includes 方法的基本语法如下: 代码语言:txt 复制 array.includes(searchElement[, fromIndex]) string.includes(searchValue[, position...
export function observe (value: any, asRootData: ?boolean): Observer | void { /*判断是否是一个对象或者传入的值是否是VNode的属性*/ if (!isObject(value) || value instanceof VNode) { return } let ob: Observer | void /*这里用__ob__这个属性来判断是否已经有Observer实例,如果没有Observer实...
代码语言:javascript 代码运行次数:0 运行 AI代码解释 Array.prototype._includes = function(searchElement,fromIndex){ if (this === null) { throw new TypeError('"this" is null or not defined'); } let that = Object(this),len = that.length >>> 0,param = arguments,index = fromIndex | 0;...