Introduction to JavaScript methods to determine whether the input string contains special symbols or expressions-JS Tutorial-php.cn

Introduction to JavaScript methods to determine whether the input string contains special symbols or expressions

巴扎黑

Release： 2017-08-18 10:25:01

Original

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This article mainly introduces the JavaScript code to determine whether the input string contains special characters and expressions. The judgment is made through the if statement of the js code, combined with the scenario developed by oneself. For the specific operation steps, you can check the detailed explanation below. Interested friends can refer to it.

The code is as follows:

reg = /[~#^$@%&!?%*]/gi;
if (reg.test(postdata.Name.trim())) {
alert("姓名不能含有特殊字符");
} else {
if (isEmojiCharacter(postdata.Name.trim())) {
alert("姓名不能含有表情");
} else {
//自己的代码
}
}
function isEmojiCharacter(substring) {
for (var i = 0; i < substring.length; i++) {
var hs = substring.charCodeAt(i);
if (0xd800 <= hs && hs <= 0xdbff) {
if (substring.length > 1) {
var ls = substring.charCodeAt(i + 1);
var uc = ((hs - 0xd800) * 0x400) + (ls - 0xdc00) + 0x10000;
if (0x1d000 <= uc && uc <= 0x1f77f) {
return true;
}
}
} else if (substring.length > 1) {
var ls = substring.charCodeAt(i + 1);
if (ls == 0x20e3) {
return true;
}
} else {
if (0x2100 <= hs && hs <= 0x27ff) {
return true;
} else if (0x2B05 <= hs && hs <= 0x2b07) {
return true;
} else if (0x2934 <= hs && hs <= 0x2935) {
return true;
} else if (0x3297 <= hs && hs <= 0x3299) {
return true;
} else if (hs == 0xa9 || hs == 0xae || hs == 0x303d || hs == 0x3030
|| hs == 0x2b55 || hs == 0x2b1c || hs == 0x2b1b
|| hs == 0x2b50) {
return true;
}
}
}
}

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