我的实践,非常自我解释

function replaceAll(string, token, newtoken) {
    if(token!=newtoken)
    while(string.indexOf(token) > -1) {
        string = string.replace(token, newtoken);
    }
    return string;
}

下面是工作代码与原型:

String.prototype.replaceAll = function(find, replace) {
    var str = this;
    return str.replace(new RegExp(find.replace(/([.*+?^=!:${}()|\[\]\/\\])/g, "\\$1"), 'g'), replace);
};

可以用常见的表达方式实现这一点,有几种可以帮助某人:

var word = "this,\\ .is*a*test,    '.and? / only /     'a \ test?";
var stri = "This      is    a test         and only a        test";

取代所有非阿尔法字符,

console.log(word.replace(/([^a-z])/g,' ').replace(/ +/g, ' '));
Result: [this is a test and only a test]

用一个空间替换多个连续空间,

console.log(stri.replace(/  +/g,' '));
Result: [This is a test and only a test]

取代所有 * 字符,

console.log(word.replace(/\*/g,''));
Result: [this,\ .isatest,    '.and? / only /     'a  test?]

取代问题标志(?)

console.log(word.replace(/\?/g,'#'));
Result: [this,\ .is*a*test,    '.and# / only /     'a  test#]

取代引用标志,

console.log(word.replace(/'/g,'#'));
Result: [this,\ .is*a*test,    #.and? / only /     #a  test?]

要取代所有“字符”,

console.log(word.replace(/,/g,''));
Result: [this\ .is*a*test    '.and? / only /     'a  test?]

替换一个特定的词,

console.log(word.replace(/test/g,''));
Result: [this,\ .is*a*,    '.and? / only /     'a  ?]

取代Backslash。

console.log(word.replace(/\\/g,''));
Result: [this, .is*a*test,    '.and? / only /     'a  test?]

以替代前滑,

console.log(word.replace(/\//g,''));
Result: [this,\ .is*a*test,    '.and?  only      'a  test?]

替换所有空间,

console.log(word.replace(/ /g,'#'));
Result: [this,\#.is*a*test,####'.and?#/#only#/#####'a##test?]

替换点,

console.log(word.replace(/\./g,'#'));
Result: [this,\ #is*a*test,    '#and? / only /     'a  test?]

要编码一个URL,你不应该只考虑空间,而是用编码URI正确地转换整个行。

encodeURI("http://www.google.com/a file with spaces.html")

要得到:

http://www.google.com/a%20file%20with%20spaces.html

2019年11月,新功能被添加到JavaScript, string.prototype.replaceAll()。

目前它仅支持巴比伦,但也许在未来它可以在所有浏览器中实施。

这可以用常规表达式和旗帜g来解决,这意味着在找到第一场比赛后不停止。

function replaceAll(string, pattern, replacement) {
    return string.replace(new RegExp(pattern, "g"), replacement);
}

// or if you want myString.replaceAll("abc", "");

String.prototype.replaceAll = function(pattern, replacement) {
    return this.replace(new RegExp(pattern, "g"), replacement);
};