Trying an example given in the DOM lesson but it is not working

I am trying to use the following example given under DOM --> Selecting Elements var elem = document.getElementByID("demo"); elem.innerHTML = "Hello World"; I made a new html document titled 'Practice.html' here is the code: <!DOCTYPE html> <head> <meta charset="utf-8"> <script type="text/javascript" src="jsPractice.js"> </script> </head> <body> <div id="demo">Hello</div> </body> I also made a new javascript file called 'jsPractice.js' here is the content: var elem = document.getElementByID("demo"); elem.innerHTML = "Hello World"; I saved both in the same folder. I am using Brackets program for this and have the live view open in a Chrome window. However all that is displayed is the word 'Hello'. I thought using this javascript code that it would be changed to "Hello World" but it is not. Can anyone help me understand what went wrong?

javascript dom getelementbyid

9th Feb 2017, 8:45 PM

Vampiire

2 Respostas

+ 3

SOLVED: the <script></script> source link must be placed at the BOTTOM of the code. I thought that it was like a CSS link that went in the header. I discovered this by trying putting the manual <script> in different areas of the HTML body (above / below the <div> element). Future reference: <script> link must be the last item in the body of the HTML file (even after </html>). If anyone can comment on why or if this is bad practice I would love to learn more.

9th Feb 2017, 9:06 PM

Vampiire

If I manually type (in the HTML file) <script> var elem = document.getElementByID("demo"); elem.innerHTML = "Hello World"; </script> and refresh the Chrome page then it works. Why will it not work with my external file?

9th Feb 2017, 8:48 PM

Vampiire