I use Google Chrome version 48.0.2564.116. By the time you read this tutorial you may be using a newer version, but the same function may still exist.
Right click your mouse on the menu button and select Inspect Element so that the Chrome web developer tool panel, aka Chrome DevTools, opens.
You should see two panels. The left panel should have the website's DOM. The right panel should have tabs Styles, Computed, Event Listeners, DOM Breakpoints, Properties.
click document bootstrap.js:716 document bootstrap.js:1808 document bootstrap.js:1003 document bootstrap.js:653 document bootstrap.js:774 document bootstrap.js:611 document bootstrap.js:436 document bootstrap.js:246 document bootstrap.js:78 body#m rightclick_hook.js:8This is a list of places that associate event handlers with the click event of this particular menu button. Unfortunately Chrome is not smart enough to know which one is really triggered by clicking on the menu button. So you need to go through them one by one.
It is no doubt that bootstrap is doing this because bootstrap is trying to show the mobile view of the site when the width of the browsing view is small. Click on the first link, which is bootstrap.js:716, and you will be directed to line 716 of bootstrap.js in the Sources section. Does it look like it would run whenever you click on the menu button? If not, go to the next one, which is bootstrap.js:1808.
What if you don't have a clue?
Questions? Let me know!