Detailed example of hiding email address with javascript-JS Tutorial-php.cn

Detailed example of hiding email address with javascript

藏色散人

Release： 2021-08-13 14:49:09

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What if I don't want my email address to be viewed by unauthorized users? A good idea is here! In this article, I will introduce to you how to hide email addresses through javascript. do not miss it!

So let’s first describe the problem in detail: “How to write a JavaScript function to hide an email address from unauthorized users”?

The code goes directly below:

<!DOCTYPE html>
<html>
<head>
    <meta charset=utf-8 />
    <title></title>
</head>
<body>
<script>
    protect_email = function (user_email) {
        var avg, splitted, part1, part2;
        splitted = user_email.split("@");
        part1 = splitted[0];
        avg = part1.length / 2;
        part1 = part1.substring(0, (part1.length - avg));
        part2 = splitted[1];
        return part1 + "...@" + part2;
    };

    console.log(protect_email("robin_singh@example.com"));
</script>
</body>
</html>

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We use console.log() to view the output information, as follows:

Detailed example of hiding email address with javascript

Normally hidden!

In the above js code, the methods and attributes that everyone needs to master are:

1, split()method

This method is used to To split a string into a string array, the syntax is "stringObject.split(separator,howmany)";

参数分别表示：
separator：字符串或正则表达式，从该参数指定的地方分割 stringObject。
howmany可选：该参数可指定返回的数组的最大长度。如果设置了该参数，返回的子串不会多于这个参数指定的数组。如果没有设置该参数，整个字符串都会被分割，不考虑它的长度。

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2, length attributes can return strings The number of characters in , the syntax is "stringObject.length".

3, substring()Method

This method is used to extract the characters between two specified subscripts in the string. Its syntax is " stringObject.substring(start,stop)", its return value is a new string. The string value contains a substring of stringObject, and its content is all characters from start to stop-1, Its length is stop minus start.

参数分别表示：
start：一个非负的整数，规定要提取的子串的第一个字符在 stringObject 中的位置。
stop可选：一个非负的整数，比要提取的子串的最后一个字符在 stringObject 中的位置多 1。
注：如果省略该参数，那么返回的子串会一直到字符串的结尾。

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Finally, I would like to recommend "JavaScript Basics Tutorial" ~ Welcome everyone to learn ~

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