Set multi-line text box [textarea] to automatically generate height-JS Tutorial-php.cn

Set multi-line text box [textarea] to automatically generate height

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Release： 2018-04-26 13:42:09

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This time I will bring you settingsMulti-line text box[textarea] automatically generates height, set multi-line text box[textarea] to automatically generate heightWhat are the precautions, The following is a practical case, let’s take a look.

Implementation functions:

1/Automatically increase the height of a row when the textarea wraps a new line
2/Automatically reduce the height of a row when the textarea deletes a row Dependency: jquery.xxx.js Needed for work I use similar functions but find it inconvenient to import other files when using a plug-in, so I wrote a

textarea jquery plug-in

<p class="form-group">
    <label class="col-sm-3 control-label no-
padding-right
" for="form-field-5"> 内容</label>
    <p class="col-sm-9">
        <textarea class="col-sm-8" id="form-field-5" placeholder="请输入内容..."></textarea>
    </p>
</p>

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jQuery.extend({
    textareaAutosize_dc: function() {
        $("textarea").on("keyup", function(e) {
            var 
current
EnterCount = $(this).val().split("\n").length;
            var lineHeight = Number($(this).css("
line-height
").replace("px", ""));
            var enterCount = $(this).attr("enterCount");
            if (currentEnterCount < enterCount && enterCount != undefined) {
                //每行减掉固定行高
                $(this).height($(this).height() - lineHeight);
            } else if (currentEnterCount > enterCount) {
                //每行加入固定行高
                $(this).height($(this).height() + lineHeight);
                $(this).attr("enterCount", currentEnterCount);
            }
            //记录当前行高
            $(this).attr("enterCount", currentEnterCount);
        });
    }
});
//调用自动高度
$.textareaAutosize_dc();

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I believe you have mastered the method after reading the case in this article, please come for more exciting information Pay attention to other related articles on php Chinese website!