如何在HTML元素中替换此文本？

Question

I have an string that shows up "Banana"

I want to replace it with "Apple"

This is what I have

<span id="Fruit">Banana</span>

This is the script I'm using.

    var td1 = document.getElementById('Fruit');
    var text = document.createTextNode("Apple");
    td1.appendChild(text);

And this is what it shows up as.

BananaApple

    <span id="Fruit">
    "Banana"
    "Apple"
    </span>

How can I get rid of Banana and just replace it with Apple?

<span id="Fruit">Apple</span>

Answer 1

只需更新innerHTML： http : //jsfiddle.net/SNtmL/

document.getElementById('Fruit').innerHTML = "Apple";

Answer 2

Assuming a single textNode :

var td1 = document.getElementById('Fruit'),
    text = document.createTextNode("Apple");
td1.replaceChild(text,td1.firstChild);

JS Fiddle demo .

Or:

var td1 = document.getElementById('Fruit');
td1.firstChild.nodeValue = 'Apple';

JS Fiddle demo .

Or:

var td1 = document.getElementById('Fruit'),
    text = 'textContent' in document ? 'textContent' : 'innerText';
td1[text] = 'Apple';

JS Fiddle demo .

References:

• Node.nodeValue .
• Node.replaceChild() .

Answer 3

You don't want a new text node, you want to alter the existing one.

A quick and dirty solution is:

document.getElementById("Fruit").innerHTML = "Apple";

Answer 4

For a more efficient way in removing all nodes from within the parent, you can always use the while() conditional:

var td1 = document.getElementById("Fruit"), text = document.createTextNode("Apple");
while(td1.hasChildNodes()) {
    td1.removeChild(td1.firstChild);
}
td1.appendChild(text);