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Add support for bootstrap4 custom breakpoints #9

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Add support for bootstrap4 custom breakpoints #9

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60 changes: 54 additions & 6 deletions content_scripts/ct.responsiveHelper.js
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,58 @@
const ATTR_TAG = 'attr-tag';
const ATTR_VERSION = 'attr-version';

// Get all bootstrap4 breakpoints from :root style
function getBreakpoints4() {
const searchStr = '--breakpoint-';

// Get all computed :root style properties
const style = getComputedStyle( document.documentElement );

// Loop properties and filter breakpoints
// Return array of objects, eg: [{ key: 'xl', val: 1200 }]
let lastEmpty = false;
let bps = [...Array(1000).keys()].reduce( ( bps, i ) => {
if ( lastEmpty ) // Bail out if last entry was already empty.
return bps;

const key = style.item( i );

if ( ! key.length ) { // Bail out if entry is empty.
lastEmpty = true;
return bps;
}

if ( ! key.startsWith( searchStr ) ) { // Filter breakpoint properties
return bps;
}

return [
...bps,
{
key: key.replace( searchStr, '' ),
val: parseInt( style.getPropertyValue( key ).trim().replace( 'px', '' ) ),
}
]
}, [] );

// Sort breakpoints from large to small.
bps.sort( ( a, b ) => {
if ( a.val > b.val ) {
return -1;
}
if ( a.val < b.val ) {
return 1;
}
return 0;
} );

// Build the breakpoint config objects.
return [...bps].map( ( bp, i ) => bps.length === i + 1
? { tag: bp.key, version: '4', cls: 'd-none d-block' }
: { tag: bp.key, version: '4', cls: 'd-none d-' + bp.key + '-block' }
);
}

function removeOldDOM() {
const oldContainer = document.querySelector(CONTAINER_SELECTOR);
if (oldContainer) {
Expand All @@ -17,11 +69,7 @@
{ tag: 'md', version: '3', cls: 'visible-md-block' },
{ tag: 'sm', version: '3', cls: 'visible-sm-block' },
{ tag: 'xs', version: '3', cls: 'visible-xs-block' },
{ tag: 'xl', version: '4', cls: 'd-none d-xl-block' },
{ tag: 'lg', version: '4', cls: 'd-none d-lg-block' },
{ tag: 'md', version: '4', cls: 'd-none d-md-block' },
{ tag: 'sm', version: '4', cls: 'd-none d-sm-block' },
{ tag: 'xs', version: '4', cls: 'd-none d-block' },
...getBreakpoints4(),
];

var container = document.createElement('div');
Expand Down Expand Up @@ -81,7 +129,7 @@
}, 66);
}
}
removeOldDOM();
removeOldDOM();
insertDOM();
sendMessage();
}());