如何获取或记录具有当前焦点的元素的ID以便以后使用javascript进行检索 [英] How to Get or Record the ID of a element with the current focus for later retrieval using javascript

问题描述

我想要的是保存html值，然后在点击前面的按钮时显示它与上一个功能。

但是我忘了想想是 document.getElementById（'id'）不返回值，它返回类似于 [object HTMLElement] 。

What i want is to save the html values and then display it with the previous function when the button called previous is clicked.
However what i forgot to think about is that document.getElementById('id') doesn't return a value, it returns something like [object HTMLElement].

如何获取ID的值？

var namevalue1 = document.getElementById('name');
var imagetitlevalue1 = document.getElementById('imagetitle');
var locationvalue1=document.getElementById('location') ;
var similaritiesvalue1 = document.getElementById('similarities');
var typevalue1 = document.getElementById('type');
var costvalue1 = document.getElementById('cost');
var datevalue1 = document.getElementById('date');
var pictureidvalue1 = document.getElementById('pictureid');


function previous()
{
    document.getElementById('name').innerHTML = namevalue1;
    document.getElementById('location').innerHTML = locationvalue1;
    document.getElementById('similarities').innerHTML = similaritiesvalue1;
    document.getElementById('type').innerHTML = typevalue1;
    document.getElementById('cost').innerHTML = costvalue1;
    document.getElementById('date').innerHTML = datevalue1;
    document.getElementById('pictureid').src = pictureidvalue1;
}

推荐答案

这取决于元素，如果您想要在元素中的HTML的文本表示，请使用 innerHTML

This depends on the type of element, if you want a textual representation of the HTML within the element, use innerHTML

 document.getElementById("id").innerHTML

如果您只想要元素及其后代使用 textContent

If you only want the text within the element and its descendants use textContent

 document.getElementById("id").textContent

最后，如果你使用< input>您可以使用的元素 value

Finally if you're working with <input> elements you could use value

 document.getElementById("id").value

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