How to remove all non-ASCII characters from string with js? (two methods)-JS Tutorial-php.cn

How to remove all non-ASCII characters from string with js? (two methods)

藏色散人

Release： 2021-08-19 10:15:41

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In " Determine whether a certain date is between two specified dates through js", I will introduce to you how to judge whether a certain date is between two specified dates through javascript. Those who are interested Friends can find out~

The focus of this article is to teach you how to use js to delete all non-ASCII characters from a string.

Below we will introduce to you two methods to achieve deletion:

The first method:

Note: This method will Use regular expressions to remove non-ASCII characters from a string; only characters with values from 0 to 127 are valid (0x7F is 127 in hexadecimal); use the .replace() method to replace non-ASCII characters Replaced with an empty string.

The complete code is as follows:

<!DOCTYPE html>
<html>
<head>
    <meta charset=utf-8 />
    <title></title>


</head>
<body style = "text-align:center;">

<h1 style = "color:#880000;" >
    PHP中文网
</h1>

<p id = "GFG_UP" style =
        "font-size: 15px; font-weight: bold;">
</p>

<button onclick = "gfg_Run()">
    点击这里
</button>

<p id = "GFG_DOWN" style = "color:#880000;
        font-size: 20px; font-weight: bold;">
</p>

<script>
    var el_up = document.getElementById("GFG_UP");
    var el_down = document.getElementById("GFG_DOWN");
    var str="Hidd©©©en Ascii ©©®®®Charac££ter";

    el_up.innerHTML = "单击按钮从给定字符串中删除所有非ascii字符"

        + " <br>给定字符串str = &#39;" + str + "&#39;";

    function gfg_Run() {
        str = str.replace(/[^\x00-\x7F]/g, "");
        el_down.innerHTML = str;
    }
</script>
</body>
</html>

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The effect is as follows:

GIF 2021-8-19 星期四上午 10-12-04.gif

Second method:

Note: This method will use regular expressions to remove non-ASCII characters from a string, just like the previous example. It specifies the character range between Unicode (0080 – FFFF) to be removed; use the .replace() method to replace non-ASCII characters with an empty string.

The complete code is as follows:

<!DOCTYPE html>
<html>
<head>
    <meta charset=utf-8 />
    <title></title>


</head>
<body style = "text-align:center;">

<h1 style = "color:#ff7800;" >
    PHP中文网
</h1>

<p id = "GFG_UP" style =
        "font-size: 15px; font-weight: bold;">
</p>

<button onclick = "gfg_Run()">
    点击这里
</button>

<p id = "GFG_DOWN" style = "color:#ff7800;
        font-size: 20px; font-weight: bold;">
</p>

<script>
    var el_up = document.getElementById("GFG_UP");
    var el_down = document.getElementById("GFG_DOWN");
    var str="Hidd©©©en??Ascii ©©®®®Charac££ter";

    el_up.innerHTML = "单击按钮从给定字符串中删除所有非ascii字符"

        + " .<br>给定字符串Str = &#39;" + str + "&#39;";

    function gfg_Run() {
        str = str.replace(/[\u{0080}-\u{FFFF}]/gu, "");
        el_down.innerHTML = str;
    }
</script>
</body>
</html>

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The effect is as follows:

GIF 2021-8-19 星期四上午 10-10-48.gif

##Finally, I would like to recommend "

JavaScript Basic Tutorial》~Welcome everyone to learn~

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