代码示例:(标识:eg_js_regexp_abc)
<!DOCTYPE html>
<html>
<body>

<p>请单击按钮,对字符串中的字符“h”进行全局搜索。</p>

<button onclick="myFunction()">试一试</button>

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

<script>
function myFunction() {
  var str = "Is this all there is?";
  var patt1 = /[h]/g; 
  var result = str.match(patt1);
  document.getElementById("demo").innerHTML = result;
}
</script>

</body>
</html>
运行结果: