trimStart() 修剪字符串开头的空格。 trimEnd() 修剪字符串结尾的空格。 valueOf() 返回指定对象的原始值。覆盖 Object.prototype.valueOf() 方法。 [@@iterator]() 返回一个新的迭代器对象,该对象迭代 String 值的码位,将每个码位作为 String 值返回。
let trimmedStringValue = stringValue.trim(); console.log(stringValue); // " hello world " console.log(trimmedStringValue); // "hello world" 由于trim()返回的是字符串的副本,因此原始字符串不受影响,即原本的前、后空格符都会保留。另外,trimStart()和trimEnd()方法分别用于从字符串开始和末尾清理空...
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Instead of using the ^ character to denote the beginning of the string, we use the $ character, which represents the end of the string. The next examples show how to use the trimRight() function. The first one is very simple, and is similar to the previous ones. The second, is ...
Newline, a special character or sequence of characters signifying the end of a line of text Electrical termination, at the end of a wire or cable to prevent an RF signal from being reflected 二、代码实现 String.prototype.trim() 浏览器兼容脚本 ...
我们仍然可以通过使用“换行符(newline character)”,以支持使用单引号和双引号来创建跨行字符串。换行符写作\n,用来表示换行: let guestList ="Guests:\n * John\n * Pete\n * Mary"; console.log(guestList);//一个多行的客人列表 例如,这两行描述的是一样的,只是书写方式不同: ...
ES2023 新特性目前有两条:Array find from last、Hashbang Grammar,也都处于 stage 4 阶段,预计 2023 年发布。 从数组末尾查找元素 新增两个方法: .findLast()、.findLastIndex() 从数组的最后一个元素开始查找,可以同 find()、findIndex() 做一个对比。
After removing the first character: ohn Doe Conclusion In this guide, we've taken a look at how to trim whitespace from strings - be it from starts, ends or both ends of the string, in JavaScript. We've explored thetrim(),trimStart()andtrimEnd()methods, which automatically trim whitespa...
trimEnd()Returns a string with removed whitespaces from the end trimStart()Returns a string with removed whitespaces from the start valueOf()Returns the primitive value of a string or a string object Note All string methods return a new value. ...
trim() Removes whitespace from both ends of a string String trunc() Returns the integer part of a number (x) Math try ... catch ... finally Marks the block of statements to be executed when an error occurs in a try block, and implements error handling Statements type Returns the name...