仅当子字符串出现在引号之外且不在javascript中的引号内时才替换子字符串

Question

/+(?=([^"\\]*(\\.|"([^"\\]*\\.)*[^"\\]*"))*[^"]*$)/g, "&&"

我用这个正则表达式替换了+＆amp;＆amp;但我如何用“＆amp;＆amp;”

替换字符串“和”

str = "Loop(this and that is "Help and enjoy")";

它应该返回：Loop(this && that is "Help and enjoy")

Answer 1

您是否尝试过更换+？

/(?:and)(?=([^"\\]*(\\.|"([^"\\]*\\.)*[^"\\]*"))*[^"]*$)/g, "&&"

Answer 2

这样做的一种方法是匹配之前的双引号内容：

var corr = {"and": "&&", "+": "&&"};

str.replace(/"[^"]+"|\+|\band\b/g, function(match) {
    return corr[match] || match;
});