RegExp-如何仅匹配边界内的单词？ \\ b不起作用

Question

Let's say I have a string "btn btn-block btn-red btn-". How do I find only "btn-" ? In JavaScript \\b works fine for "btn-block" but it breaks when it ends with a hyphen. When I use /\\bbtn-\\b/ it selects "btn-block" and "btn-red" but not the actual "btn-" which I want. Is there a workaround for this?

Answer 1

与此相关的Group 1应该工作\\b(btn-)(\\s|$)

Answer 2

使用此/btn-/g或/btn-/gi忽略/btn-/gi ，请尝试此http://www.regviz.org/

Answer 3

It depends on what you mean by "find". If you mean "If it exists in the string, return true" then this will work:

var myString = "btn btn-block btn-red btn-";
var myStringTwo = "btn btnblock";

// This will print "Found btn- in myString"
if(myString.search(/btn-/) > -1)
    console.log("Found btn- in myString");
else
    console.log("Couldn't find btn- in myString");

// This will print "Couldn't find btn- in myStringTwo"
if(myStringTwo.search(/btn-/) > -1)
    console.log("Found btn- in myStringTwo ");
else
    console.log("Couldn't find btn- in myStringTwo");