Question

我在看这个例子：

https://www.w3schools.com/jsref/tryit.asp?filename=tryjsref_match_regexp

<!DOCTYPE html>
<html>
<body>

<p>Click the button to perform a global search for the letters "ain+" in a string, and display the matches.</p>

<button onclick="myFunction()">Try it</button>

<p id="demo"></p>

<script>
function myFunction() {
    var str = "The rain in SPAIN stays mainly in the plain"; 
    var res = str.match(/ain+/g);
    document.getElementById("demo").innerHTML = res;
}
</script>

</body>
</html>

这就是我需要的，但是如果我在'ain'的末尾添加一个'+'它不起作用，我应该怎么做？

Answer 1

/ ain + /匹配ain，ainn，ainnn，ainnnn ......＆＃34; ai＆＃34;和一个或多个＆＃34; n＆＃34;。

Answer 2

function myFunction() {
  var str = "The rain in SPAIN stays mainly in the plain ain+";
  var res = str.match(/ain\+/g);
  document.getElementById("demo").innerHTML = "In the sentence: [" + str + " ] " + res + " was found.";
}

<p>Click the button to perfom a global search for the letters "ain+" in a string, and display the matches.</p>

<button onclick="myFunction()">Try it</button>

<p id="demo"></p>

在str.match javascript的字符串中匹配'+'

2 个答案: