javascript - 如何替换字符串中的反斜杠？

This question already has answers here:

JavaScript: A BackSlash as part of the string
                                
                                    （3个答案）
                                
                        
                2年前关闭。
            
        

以下代码有什么问题？

预期输出：substr1 @ substr2 @ substr3

var str = "substr1\substr2\substr3"
// it works if I use the double slash "\\" in thestring but not with single.
console.log(str.replace(/\\/g, "@"));

最佳答案

您的初始字符串本身没有反斜杠。要验证，请检查以下代码段：

var str = "substr1\sustr2\substr3"
console.log(str);

您可以通过先转义反斜杠然后将其替换为@来获得您期望的实际输出：

var str = "substr1\\sustr2\\substr3"
console.log(str.replace(/\\/g, "@"));