Selenium IDE fails getElementById()

Question

I have the following statement in my Selenium IDE script: I store javascript{window.document.getElementById('demo').innerHTML} text

But this always fails with the error

[info] Executing: |store | javascript{window.document.getElementById('demo').innerHTML} | text | [error] Unexpected Exception: TypeError: window.document.getElementById(...) is null.

The HTML source code I am using is from w3schools. The corresponding HTML source is

<p id="demo">Click the button to change the text in this paragraph.</p>

<button onclick="myFunction()">Try it</button>

<script>
function myFunction() {
    document.getElementById("demo").innerHTML = "Hello World";
}
</script>

There is no problem when I execute just

<tr>
    <td>store</td>
    <td>javascript{window.document.innerHTML}</td>
    <td>text</td>
</tr>

but trying to retrieve an element by its id is not working. What am I missing?

Actually you are using main document while desire I'd element is inside an iframe you need to call `getElementById` on iframe document...as `window.frame["demo_frame"].document.getElementById("demo").innerHTML = "Hello World";`...:) — Saurabh Gaur, Aug 28 '16 at 15:08
@SaurabhGaur This just returns `[error] Threw an exception: window.frame is undefined`. — , Aug 28 '16 at 15:49
@SaurabhGaur It is still failing: `[error] Threw an exception: window.frames.iframeResult.document is undefined`. I also tried with `frames[0]` and `frames[1]`. It then throws the `null` exception again. — , Aug 28 '16 at 16:24
Try once as `document.getElementById("iframe Id").contentDocument.getElementById("demo").i‌nnerHTML = "Hello World";` and let me know...:) — Saurabh Gaur, Aug 28 '16 at 16:28
@SaurabhGaur Your last suggestion worked. If you want to make your last comment an answer then I will accept it. Thanks. — , Aug 28 '16 at 17:12
Ya sure, I have provided it as an answer, you can accept it. Thanks..:) — Saurabh Gaur, Aug 28 '16 at 17:17

score 0 · Accepted Answer · answered Aug 28 '16 at 17:16

0

Actually you are using main document while desire I'd element is inside an iframe you need to call getElementById on iframe document as below :-

document.getElementById("iframe Id").contentDocument.getElementById("demo").i‌nnerHTML = "Hello World";

answered Aug 28 '16 at 17:16

Saurabh Gaur

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please could u help me here: https://stackoverflow.com/questions/47944349/selenium-cannot-click-on-an-element-inside-a-modal I am struggling since 2 days – eeadev Dec 29 '17 at 10:07

Selenium IDE fails getElementById()

1 Answers1