function isValidUsername(username) { return username.includes("@") && username.includes("."); } const email = "user@example.com"; console.log(isValidUsername(email)); // true 2. 内容过滤:在处理文本内容时,检测是否包含敏感词、非法字符或特定关键词,以进行内容审核、自动标记或过滤。 function c...
方案四、自定义函数inArray 数组检查value, 对象检查key /*** 自定义成员检查函数* @param {List/Object} array* @param {非引用类型} value*/function inArray(array, value) {// 数组检查valueif (Array.isArray(array)) {for (let index in array) {if (array[index] == value) {return true;}}...
cc:function(){ console.log("value3") } } 1. 2. 3. 4. 5. 6. 7. 8. 一、JS原生方法 1. javascript遍历的常用的遍历方法是for循环和for-in,ES5的时候加上了forEach方法(IE9以下不支持)。 /***js原生遍历***/ //for循环遍历数组 for...
在JavaScript中,includes() 方法用于判断一个字符串是否包含一个指定的子字符串,或者一个数组是否包含一个指定的元素。如果你遇到了 (in promise) typeerror: data.includes is not a function 的错误,这通常意味着你尝试在一个不支持 includes() 方法的类型上调用这个方法。以下是一些可能的解决步骤: 确认data变量...
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 复制 // https://tc39.github.io/ecma262/#sec-array.prototype.includesif(!Array.prototype.includes){Object.defineProperty(Array.prototype,'includes',{value:function(searchElement,fromIndex){// 1. Let O be ? ToObject(this value).if(this==null){thrownewTypeError('"this" is...
if (!Array.prototype.includes) { Array.prototype.includes = function(searchElement /*, fromIndex*/) { 'use strict'; if (this == null) { throw new TypeError('Array.prototype.includes called on null or undefined'); } var O = Object(this); var len = parseInt(O.length, 10) || 0; ...
❮PreviousJavaScript StringReferenceNext❯ Examples Check if a string includes "world": lettext ="Hello world, welcome to the universe."; letresult = text.includes("world"); Try it Yourself » More examples below. Description Theincludes()method returnstrueif a string contains a specified ...
String.prototype.includes){Object.defineProperty(String.prototype,'includes',{value:function(search,star...
function removeInvalidChars(input) { const invalidChars = ["\\", "/", "*", "?", "<", ">", "|"]; for (const char of invalidChars) { while (input.includes(char)) { input = input.replace(char, ""); } } return input; } const dirtyData = "Unsafe*Characters\\In?Here>"; ...