我想将表格内容拖放到文本框中。
HTML:
<table id = "carTypes">
<tr><th>Car Type</th><th>Price per mile</th></tr>
<tr><td carValue = "compact" draggable = "true" >Compact</td><td>$0.99</td></tr>
<tr><td carValue = "Intermediate" draggable = "true" >Intermediate</td><td>$1.99</td></tr>
<tr><td carValue = "Luxury" draggable = "true" >Luxury</td><td>$2.99</td></tr>
<tr><td carValue = "Limo" draggable = "true" >Limo</td><td>$4.99</td></tr>
</table><p>Drag and Drop from the above car-types list to below box: <input type = "text" id = "carTypeChosen" placeholder = 'car type you want' /></p>
JS:
var registerDragDrop = function() {
var dragSource = document.getElementById("carTypes");
dragSource.ondragstart = function(event) {
var dataToCopy = this.getElementsByTagName("td").getAttribute("carValue");
event.dataTransfer.setData("Text", dataToCopy);
return true;
};
var dropTarget = document.getElementById("carTypeChosen");
dropTarget.ondrop = function(event) {
this.value = event.dataTransfer.getData("Text");
event.preventDefault();
return false;
};
dropTarget.ondragover = function(event) {
event.preventDefault();
return false;
};
dropTarget.ondragend = function(event) {
event.preventDefault();
return false;
};
};
当我拖放汽车类型时,正在删除空值而不是汽车价值。我不知道我做错了什么。请解释
答案 0 :(得分:0)
<强> Working Fiddle 强>
您的代码在一些更改后工作,this
内dragSource.ondragstart
函数返回所有表而不是删除td
当您尝试生成错误的getAttribute("carValue")
时,这意味着什么因为表格没有carValue
attribut,所以请使用返回目标的event.target
或在我们的案例中删除td而不是this
。
此外,您必须在定义后调用您的函数registerDragDrop()
。
JS更改
替换:
this.getElementsByTagName("td").getAttribute("carValue");
通过:
var dataToCopy = event.target.getAttribute("carValue");
完整JS:
var registerDragDrop = function() {
var dragSource = document.getElementById("carTypes");
dragSource.ondragstart = function(event) {
var dataToCopy = event.target.getAttribute("carValue");
event.dataTransfer.setData("Text", dataToCopy);
return true;
};
var dropTarget = document.getElementById("carTypeChosen");
dropTarget.ondrop = function(event) {
this.value = event.dataTransfer.getData("Text");
event.preventDefault();
return false;
};
dropTarget.ondragover = function(event) {
event.preventDefault();
return false;
};
dropTarget.ondragend = function(event) {
event.preventDefault();
return false;
};
};
希望得到这个帮助。