entityMap|0|type|LINK|mutability|MUTABLE|data|url|https://jsfiddle.net/Jonah/sbtoukan/1/|blocks|key|1cmf0|text|试试这个..。小提琴：https://jsfiddle.net/Jonah/sbtoukan/1/|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|fcd72|var+canvas+=+new+fabric.Canvas('container');

+var+oText+=+new+fabric.IText('Tap+and+Type',+{+
+++++left:+0,+
+++++top:+0,
+++++fontFamily:+'Bree+Serif',
+++++fontSize:+22,
+++++cache:false
+});

canvas.on("text:editing:entered",+clearText);

+function+clearText(e){
++++if(e.target.type+===+"i-text"){
++++++++if(e.target.text+===+"Tap+and+Type"){
++++++++++++e.target.text+=+"";
++++++++++++canvas.renderAll();
+++++++++};
+++++}
++}

++canvas.add(oText);|code-block|syntax|javascript|4veip^0|B|12|0|0|0^^$0|$1|$2|3|4|5|6|$7|8]]]|9|@$A|B|C|D|2|E|F|Q|G|@]|H|@$I|R|J|S|A|T]]|6|$]]|$A|K|C|L|2|M|F|U|G|@]|H|@]|6|$N|O]]|$A|P|C|-4|2|E|F|V|G|@]|H|@]|6|$]]]]

<p>Try this...
Fiddle: <a href="https://jsfiddle.net/Jonah/sbtoukan/1/" rel="nofollow noreferrer">https://jsfiddle.net/Jonah/sbtoukan/1/</a></p>

<pre><code>var canvas = new fabric.Canvas('container');

 var oText = new fabric.IText('Tap and Type', { 
     left: 0, 
     top: 0,
     fontFamily: 'Bree Serif',
     fontSize: 22,
     cache:false
 });

canvas.on("text:editing:entered", clearText);

 function clearText(e){
    if(e.target.type === "i-text"){
        if(e.target.text === "Tap and Type"){
            e.target.text = "";
            canvas.renderAll();
         };
     }
  }

  canvas.add(oText);
</code></pre>


entityMap|blocks|key|d9rta|text|你可以试试这段代码。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|c0p88|var+textFunctions+=+{

textEditing:+function(e)+{
++++if+(e.target.type+==+'i-text')+{
++++++++if+(typeof+e.target.text+==+'string'+&&+e.target.text+==+'Tap+and+Type')+{
++++++++++++textFunctions.textChanging();
++++++++}+else+{
++++++++++++return+false;
++++++++}
++++}
},
textChanging:+function()+{
++++return+document.onkeydown+=+function(e)+{
++++++++if+(e.target.value+==+'Tap+and+Type')+{
++++++++++++var+obj+=+canvas.getActiveObject();
++++++++++++obj.selectAll();
++++++++++++obj.setCoords();
++++++++++++canvas.renderAll();
++++++++}
++++};
},

textNull:+function(e)+{
++++if+(e.target.type+==+'i-text')+{
++++++++if+(typeof+e.target.text.length+==+'number'+&&+e.target.text.length+==+0)+{
++++++++++++var+obj+=+canvas.getActiveObject();
++++++++++++obj.set({+'text':+'Tap+and+Type'+});
++++++++++++obj.setCoords();
++++++++++++canvas.renderAll();
++++++++}
++++}
}
}

++++canvas.on('text:editing:entered',+textFunctions.textEditing);
++++canvas.on('text:editing:exited',+textFunctions.textNull);|code-block|syntax|javascript|adeht^0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|I|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|J|9|@]|A|@]|B|$F|G]]|$2|H|4|-4|6|7|8|K|9|@]|A|@]|B|$]]]]

<p>U can try this code.</p>

<pre><code>var textFunctions = {

textEditing: function(e) {
    if (e.target.type == 'i-text') {
        if (typeof e.target.text == 'string' &amp;&amp; e.target.text == 'Tap and Type') {
            textFunctions.textChanging();
        } else {
            return false;
        }
    }
},
textChanging: function() {
    return document.onkeydown = function(e) {
        if (e.target.value == 'Tap and Type') {
            var obj = canvas.getActiveObject();
            obj.selectAll();
            obj.setCoords();
            canvas.renderAll();
        }
    };
},

textNull: function(e) {
    if (e.target.type == 'i-text') {
        if (typeof e.target.text.length == 'number' &amp;&amp; e.target.text.length == 0) {
            var obj = canvas.getActiveObject();
            obj.set({ 'text': 'Tap and Type' });
            obj.setCoords();
            canvas.renderAll();
        }
    }
}
}

    canvas.on('text:editing:entered', textFunctions.textEditing);
    canvas.on('text:editing:exited', textFunctions.textNull);
</code></pre>


entityMap|0|type|LINK|mutability|MUTABLE|data|url|https://jsfiddle.net/xpntggdo/8/|blocks|key|dmru7|text|你也可以看看这个fiddle+https://jsfiddle.net/xpntggdo/8/。我已经实现了一些额外的功能，比如动态宽度文本框。在这种情况下，宽度不断增加，直到到达画布的边界。|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|1s3un|您可能已经注意到，如果在创建对象时设置了预定义的宽度，文本将自动转到下一行。我希望这段代码或者至少这段代码的一部分可以帮助你做任何你正在做的事情。|ddp6b|textBox.on("editing:entered",+function+(e)+{
++++var+obj+=+canvas.getActiveObject();
++++console.log("entered+editing");
++++if(obj.text+==+"Enter+Text")
++++{
++++++++obj.selectAll();
++++++++obj.removeChars();
++++}
});|code-block|syntax|javascript|58ruj^0|F|W|0|0|0|0^^$0|$1|$2|3|4|5|6|$7|8]]]|9|@$A|B|C|D|2|E|F|S|G|@]|H|@$I|T|J|U|A|V]]|6|$]]|$A|K|C|L|2|E|F|W|G|@]|H|@]|6|$]]|$A|M|C|N|2|O|F|X|G|@]|H|@]|6|$P|Q]]|$A|R|C|-4|2|E|F|Y|G|@]|H|@]|6|$]]]]

<p>You can also check out this fiddle <a href="https://jsfiddle.net/xpntggdo/8/" rel="nofollow noreferrer">https://jsfiddle.net/xpntggdo/8/</a> . I have implemented some additional functionalities from my side such as dynamic width text box. In this, the width keeps on increasing until the boundary of canvas is reached. </p>

<p>You might have noticed that if you set a predefined width at the time of object creation, the text automatically goes to the next line. I hope this code or atleast some parts of this code might help you with whatever you are working on.</p>

<pre><code>textBox.on("editing:entered", function (e) {
    var obj = canvas.getActiveObject();
    console.log("entered editing");
    if(obj.text == "Enter Text")
    {
        obj.selectAll();
        obj.removeChars();
    }
});
</code></pre>


entityMap|blocks|key|28kp|text|根据上面关于Fabric+2.0的一些答案，removeChars()似乎已经失败了。以下是一个解决方法：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|6cpj9|textObj.on("editing:entered",+function+(e)+{
++++var+obj+=+canvas.getActiveObject();
++++if(obj.text+===+DEFAULT_MSG)
++++{
++++++++obj.selectAll();
++++++++obj.text+=+"";
++++++++obj.hiddenTextarea.value+=+"";
++++++++obj.dirty+=+true;
++++++++obj.setCoords();
++++++++canvas.renderAll();
++++}
});|code-block|syntax|javascript|e4f2r^0|M|D|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|M|9|@$A|N|B|O|C|D]]|E|@]|F|$]]|$2|G|4|H|6|I|8|P|9|@]|E|@]|F|$J|K]]|$2|L|4|-4|6|7|8|Q|9|@]|E|@]|F|$]]]]

<p>Expanding upon some of the answers above for Fabric 2.0, <code>removeChars()</code> appears to be broken. Here's a work-around:</p>

<pre><code>textObj.on("editing:entered", function (e) {
    var obj = canvas.getActiveObject();
    if(obj.text === DEFAULT_MSG)
    {
        obj.selectAll();
        obj.text = "";
        obj.hiddenTextarea.value = "";
        obj.dirty = true;
        obj.setCoords();
        canvas.renderAll();
    }
});
</code></pre>


<p>At the moment I ' m working on one project with fabricjs . In project I use Itext from fabricjs to add text in canvas. I want when the user click on default text then auto remove default text. I use this code.</p>

<p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>$("#addText").on("click", function addText() {
  var oText = new fabric.IText('Tap and Type', { 
    left: 120, 
    top: 120,
    fontFamily: 'Bree Serif',
	fontSize: 22,
    cache:false
   
});
  			 $('#oText').css('fontSize', $('#fontSize').val() + 'px');

			oText.set({ fill: $(".addText-options .sp-preview-inner").css("background-color") });
			oText.id = 'userDesign';
			canvas.add(oText);
			
			currentObject.getColor(tinycolor.toRgbString());
			canvas.renderAll();
			saveCanvasState();
	})</code></pre>
</div>
</div>
</p>


how to remove default text in Itext fabric js

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

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 目前，我正在与fabricjs合作一个项目。在项目中，我使用fabricjs中的Itext在画布中添加文本。我想当用户点击默认文本，然后自动删除默认文本。我使用这个代码。 ​ $("#addText").on("click", function addText() {  var oText = new fabric....

问如何删除Itext fabric js中的默认文本
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问如何删除Itext fabric js中的默认文本EN