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

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

  内容 
  
 

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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