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>We use console.log() to view the output information, as follows:
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。
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。
Finally, I would like to recommend "JavaScript Basics Tutorial" ~ Welcome everyone to learn ~
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