[英]how to check whether any special character is present in a particular string
我想从字符串中删除'<''>'，所以我使用了脚本
<html>
<body>
<script>
var f = ((/(<script>)/i).exec("hello<") != null);
alert("ok"+f);
document.write("<br>Value:" +f);
</script>
</body>
</html>
但是我将变量f值设置为null。
如果代码有任何问题，请您帮我。
我希望这个能帮上忙
if("hello<".indexOf('<') != -1){
var f = "hello<".replace('<','');
alert("ok "+f);
}
您可以使用JavaScript正则表达式来实现此目的。
"<script>".replace(/<|>/ig, "");
outputs: "script"
var f = ('<script>'.replace(/<|>/g, ''));
alert("ok"+f);
document.write("<br>Value:" +f);
您可以使用.test方法：
var originalString = '<script>',
r = originalString.test(/<|>/g, ''); // returns true or false
if (r === true) {
//whatever you wanna do if you have special characters in
// your string
} else {
// no special chars - all clean!
}
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