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[SPARK-29504][WEBUI] Toggle full job description on click

### What changes were proposed in this pull request?
On clicking job description in jobs page, the description was not shown fully.
Add the function for the click event on description.

### Why are the changes needed?
when there is a long description of a job, it cannot be seen fully in the UI.
The feature was added in #24145
But it is missed after #25374

Before change:
![Screenshot from 2019-10-23 11-23-00](
After change: on Double click over decription
![Screenshot from 2019-10-23 11-20-02](

### Does this PR introduce any user-facing change?


### How was this patch tested?
Manually test

Closes #26222 from PavithraRamachandran/jobs_description_tooltip.

Authored-by: Pavithra Ramachandran <>
Signed-off-by: Gengliang Wang <>
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PavithraRamachandran authored and gengliangwang committed Oct 24, 2019
1 parent 9e77d48 commit 1296bbb8ac7f582f8689f3e2f36614cf541b80d4
Showing with 8 additions and 1 deletion.
  1. +8 −1 core/src/main/resources/org/apache/spark/ui/static/webui.js
@@ -87,4 +87,11 @@ $(function() {

$(function() {
// Show/hide full job description on click event.
$(".description-input").click(function() {

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