在JavaScript中使用正则表达式替换

Question

如何在JavaScript中使用replace regex去除句子中不是字母，数字或空格的所有内容？

var string = "here is a sentence with letters and numbers and symbols 123!@#";

Answer 1

var string = "here is a sentence with letters and numbers and symbols 123!@#";

var x = string.replace(/[^a-zA-Z0-9 ]/g,'')
console.log(x)