JS trim去除字符串收尾指定字符

String.prototype.trim = function (char, type) {
???if (char) {
???????if (type == ‘left‘) {
???????????return this.replace(new RegExp(‘^\\‘+char+‘+‘, ‘g‘), ‘‘);
???????} else if (type == ‘right‘) {
???????????return this.replace(new RegExp(‘\\‘+char+‘+$‘, ‘g‘), ‘‘);
???????}
???????return this.replace(new RegExp(‘^\\‘+char+‘+|\\‘+char+‘+$‘, ‘g‘), ‘‘);
???}
???return this.replace(/^\s+|\s+$/g, ‘‘);
};

// 去除字符串首尾的全部空白
var str = ‘ Ruchee ‘;
console.log(‘xxx‘ + str.trim() + ‘xxx‘); ?// xxxRucheexxx

// 去除字符串左侧空白
str = ‘ Ruchee ‘;
console.log(‘xxx‘ + str.trim(‘ ‘, ‘left‘) + ‘xxx‘); ?// xxxRuchee xxx

// 去除字符串右侧空白
str = ‘ Ruchee ‘;
console.log(‘xxx‘ + str.trim(‘ ‘, ‘right‘) + ‘xxx‘); ?// xxx Rucheexxx

// 去除字符串两侧指定字符
str = ‘/Ruchee/‘;
console.log(str.trim(‘/‘)); ?// Ruchee

// 去除字符串左侧指定字符
str = ‘/Ruchee/‘;
console.log(str.trim(‘/‘, ‘left‘)); ?// Ruchee/

// 去除字符串右侧指定字符
str = ‘/Ruchee/‘;
console.log(str.trim(‘/‘, ‘right‘)); ?// /Ruchee