Commit 153dddef authored by Sam Bigelow's avatar Sam Bigelow Committed by Phil Hughes

Resolve "Jump to top in merge request"

parent a99f342b
......@@ -217,6 +217,28 @@ export default class MergeRequestTabs {
}
this.eventHub.$emit('MergeRequestTabChange', this.getCurrentAction());
} else if (action === this.currentAction) {
// ContentTop is used to handle anything at the top of the page before the main content
const mainContentContainer = document.querySelector('.content-wrapper');
const tabContentContainer = document.querySelector('.tab-content');
if (mainContentContainer && tabContentContainer) {
const mainContentTop = mainContentContainer.getBoundingClientRect().top;
const tabContentTop = tabContentContainer.getBoundingClientRect().top;
// 51px is the height of the navbar buttons, e.g. `Discussion | Commits | Changes`
const scrollDestination = tabContentTop - mainContentTop - 51;
// scrollBehavior is only available in browsers that support scrollToOptions
if ('scrollBehavior' in document.documentElement.style) {
window.scrollTo({
top: scrollDestination,
behavior: 'smooth',
});
} else {
window.scrollTo(0, scrollDestination);
}
}
}
}
......
---
title: Allow user to scroll to top of tab on MR page
merge_request:
author:
type: added
......@@ -239,4 +239,38 @@ describe('MergeRequestTabs', function() {
expect($('.content-wrapper')).toContainElement('.container-limited');
});
});
describe('tabShown', function() {
const mainContent = document.createElement('div');
const tabContent = document.createElement('div');
beforeEach(function() {
spyOn(mainContent, 'getBoundingClientRect').and.returnValue({ top: 10 });
spyOn(tabContent, 'getBoundingClientRect').and.returnValue({ top: 100 });
spyOn(document, 'querySelector').and.callFake(function(selector) {
return selector === '.content-wrapper' ? mainContent : tabContent;
});
this.class.currentAction = 'commits';
});
it('calls window scrollTo with options if document has scrollBehavior', function() {
document.documentElement.style.scrollBehavior = '';
spyOn(window, 'scrollTo');
this.class.tabShown('commits', 'foobar');
expect(window.scrollTo.calls.first().args[0]).toEqual({ top: 39, behavior: 'smooth' });
});
it('calls window scrollTo with two args if document does not have scrollBehavior', function() {
spyOnProperty(document.documentElement, 'style', 'get').and.returnValue({});
spyOn(window, 'scrollTo');
this.class.tabShown('commits', 'foobar');
expect(window.scrollTo.calls.first().args).toEqual([0, 39]);
});
});
});
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