replace() 方法用于在字符串中用一些字符替换另一些字符,或替换一个与正则表达式匹配的子串。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 //replace(substr, replacetext) var myString = '999 JavaScript Coders'; console.log(myString.replace(/JavaScript/i, "jQuery")); //output: 999 jQuery Cod...
document.write(str.replace(/Microsoft/g,"W3School")) 输出: Welcome to W3School! We are proud to announce that W3School has one of the largest Web Developers sites in the world. 例子3 您可以使用本例提供的代码来确保匹配字符串大写字符的正确: text = "javascript Tutorial"; text.replace(/javasc...
1<!DOCTYPE html>234567/*8这段代码是为JavaScript的String对象添加一个LiminReplace 方法,9用以替换字符串中得HTML字符(把"替换为”,<替换为<,>替换为>),10*/1112//在String对象的原型中添加自定方法13String.prototype.LiminReplace=function() {14//定义要替换的Json对象15varRplJson={16//"First": "...
//replace(substr, replacetext)varmyString ='999 JavaScript Coders';console.log(myString.replace(/JavaScript/i,"jQuery"));//output: 999 jQuery Coders//replace(regexp, replacetext)varmyString ='999 JavaScript Coders';console.log(myString.replace(newRegExp...
第179天:javascript中replace使用总结 1 var text = 'cat, bat, sat, fat'; 2 // 使用/at/g 在全局中匹配at,并用ond进行替换 3 var result = text.replace...1 var text = 'cat, bat, sat, fat'; 2 // 使用/(.at)/g 括号为捕获组,此时只有一个,因此所匹配的值存放在$1中 3 v...
console.log(new_text); Run Code Output 4.3518 You may get different output when you run this program. It's because the first digit intextis replaced with a random digit between0and9. Also Read: JavaScript String replace()
A stringA new string where the specified value(s) has been replaced. More Examples A global, case-insensitive replacement: lettext ="Mr Blue has a blue house and a blue car"; letresult = text.replace(/blue/gi,"red"); Try it Yourself » ...
可以使用String作为toString()更可靠的代替方法,因为它在用于null和undefined时仍然有效。例如: js constnullVar=null;nullVar.toString();// TypeError: nullVar is nullString(nullVar);// "null"constundefinedVar=undefined;undefinedVar.toString();// TypeError: undefinedVar is undefinedString(undefinedVar);/...
// passing a string as the first parameter let pattern = "Java"; let new_text = text.replace(pattern, "JavaScript"); console.log(new_text); // passing a regex as the first parameter pattern = /Java/; new_text = text.replace(pattern, "JavaScript"); console.log(new_text); ...
3. 组合使用其他字符串方法:与其他字符串方法(如trim(),split(),substring(),replace()等)配合,可以实现更复杂的文本处理逻辑。 const sentence = "A quick brown fox jumps over the lazy dog."; const wordToFind = "fox"; const words = sentence.split(' '); ...