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Fixed callback to always be run after the css is loaded. #31

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Fixed callback to always be run after the css is loaded. #31

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2abd296
Fixed callback to be run after the css is loaded.
msigley Jul 2, 2015
d545fdd
Re-minified with closure compiler.
msigley Jul 2, 2015
9040ee3
Fixed various CSS load order and responsive issues
msigley Apr 25, 2017
24ac237
Updated version to 2.0.0
msigley Apr 25, 2017
09b8d8d
Re-minified for version 2.0.0
msigley Apr 25, 2017
2f8d72f
Prevent css body class from constantly being updated in resize event
msigley Mar 22, 2018
c8d72a3
Reminified for 2.0.1
msigley Mar 22, 2018
8acb768
Fixed body classes.
msigley Nov 30, 2018
8e7a174
Update adapt.min.js
msigley Nov 30, 2018
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356 changes: 218 additions & 138 deletions assets/js/adapt.js
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Original file line number Diff line number Diff line change
Expand Up @@ -12,141 +12,221 @@
*/

// Closure.
(function(w, d, config, undefined) {
// If no config, exit.
if (!config) {
return;
}

// Empty vars to use later.
var url, url_old, timer;

// Alias config values.
var callback = config.callback || function(){};
var path = config.path ? config.path : '';
var range = config.range;
var range_len = range.length;

// Create empty link tag:
// <link rel="stylesheet" />
var css = d.createElement('link');
css.rel = 'stylesheet';
css.media = 'screen';

// Called from within adapt().
function change(i, width) {
// Set the URL.
css.href = url;
url_old = url;

// Fire callback.
callback(i, width);
}

// Adapt to width.
function adapt() {
// This clearTimeout is for IE.
// Really it belongs in react(),
// but doesn't do any harm here.
clearTimeout(timer);

// Parse viewport width.
var width = d.documentElement ? d.documentElement.clientWidth : 0;

// While loop vars.
var arr, arr_0, val_1, val_2, is_range, file;

// How many ranges?
var i = range_len;
var last = range_len - 1;

// Start with blank URL.
url = undefined;

while (i--) {
// Turn string into array.
arr = range[i].split('=');

// Width is to the left of "=".
arr_0 = arr[0];

// File name is to the right of "=".
// Presuppoes a file with no spaces.
// If no file specified, make empty.
file = arr[1] ? arr[1].replace(/\s/g, '') : undefined;

// Assume max if "to" isn't present.
is_range = arr_0.match('to');

// If it's a range, split left/right sides of "to",
// and then convert each one into numerical values.
// If it's not a range, turn maximum into a number.
val_1 = is_range ? parseInt(arr_0.split('to')[0], 10) : parseInt(arr_0, 10);
val_2 = is_range ? parseInt(arr_0.split('to')[1], 10) : undefined;

// Check for maxiumum or range.
if ((!val_2 && i === last && width > val_1) || (width > val_1 && width <= val_2)) {
// Build full URL to CSS file.
file && (url = path + file);

// Exit the while loop. No need to continue
// if we've already found a matching range.
break;
}
}

// Was it created yet?
if (!url_old) {
// Apply changes.
change(i, width);

// If URL has been defined, add the CSS.
// Use faster document.head if possible.
url && (d.head || d.getElementsByTagName('head')[0]).appendChild(css);
}
else if (url_old !== url) {
// Apply changes.
change(i, width);
}
}

// Fire off once.
adapt();

// Slight delay.
function react() {
// Clear the timer as window resize fires,
// so that it only calls adapt() when the
// user has finished resizing the window.
clearTimeout(timer);

// Start the timer countdown.
timer = setTimeout(adapt, 16);
// -----------------------^^
// Note: 15.6 milliseconds is lowest "safe"
// duration for setTimeout and setInterval.
//
// http://www.nczonline.net/blog/2011/12/14/timer-resolution-in-browsers
}

// Do we want to watch for
// resize and device tilt?
if (config.dynamic) {
// Event listener for window resize,
// also triggered by phone rotation.
if (w.addEventListener) {
// Good browsers.
w.addEventListener('resize', react, false);
}
else if (w.attachEvent) {
// Legacy IE support.
w.attachEvent('onresize', react);
}
else {
// Old-school fallback.
w.onresize = react;
}
}

// Pass in window, document, config, undefined.
})(this, this.document, ADAPT_CONFIG);
(function (w, d, config, undefined) {
// If no config, exit.
if (!config) {
return;
}

// Empty vars to use later.
var docHead, docBody, bodyClass, url, url_old, timer, css, css_old;

// Alias config values.
var callback = config.callback || function () { },
path = config.path ? config.path : '',
range = config.range,
range_len = range.length;

function setupAdapt() {
d.removeEventListener( "DOMContentLoaded", setupAdapt );

// Cache <head> and <body> element reference
// Use faster document.head and document.body if possible.
docHead = (d.head || d.getElementsByTagName('head')[0]);
docBody = (d.body || d.getElementsByTagName('body')[0]);
bodyClass = '';

// Get existing link tag if cssId was provided
if (config.cssId)
css = d.getElementById(config.cssId);

// Fire off once.
adapt();

// Clean up any preexisting body classes
var classesToRemove = [];
for (var i = 0; i < docBody.classList.length; i++) {
if( docBody.classList[i].charAt(0) == '_' && docBody.classList[i] != bodyClass )
classesToRemove[classesToRemove.length] = docBody.classList[i];
}
for (var i = 0; i < classesToRemove.length; i++) {
docBody.classList.remove(classesToRemove[i]);
}

// Do we want to watch for
// resize and device tilt?
if (config.dynamic) {
// Event listener for window resize,
// also triggered by phone rotation.
if (w.addEventListener) {
// Good browsers.
w.addEventListener('resize', react, false);
}
else if (w.attachEvent) {
// Legacy IE support.
w.attachEvent('onresize', react);
}
else {
// Old-school fallback.
w.onresize = react;
}
}
}

// Called from within adapt().
function change(i, width, linkElement) {
// Set the URL.
linkElement.href = url;
url_old = url;

linkElement.onload = function () {
// Remove old css
if(css_old) {
docHead.removeChild(css_old);
css_old = undefined;
}
// Fire callback.
callback(i, width);
};
}

// Adapt to width.
function adapt() {
// This clearTimeout is for IE.
// Really it belongs in react(),
// but doesn't do any harm here.
clearTimeout(timer);

// Remove old css
if(css_old) {
docHead.removeChild(css_old);
css_old = undefined;
}

// Parse viewport width.
var width = d.documentElement ? d.documentElement.clientWidth : 0;

// While loop vars.
var arr, arr_0, val_1, val_2, is_range, file;

// How many ranges?
var i = range_len;
var last = range_len - 1;

// Start with blank URL.
url = undefined;

while (i--) {

// Find first occurance of "=".
equalPos = range[i].indexOf('=');

// Width is to the left of "=".
arr_0 = range[i].substr(0, equalPos);

// File name is to the right of "=".
// Presuppoes a file with no spaces.
// If no file specified, make empty.
file = range[i].substr(equalPos+1);
file = file ? file.replace(/\s/g, '') : undefined;

// Assume max if "to" isn't present.
is_range = arr_0.match('to');

// If it's a range, split left/right sides of "to",
// and then convert each one into numerical values.
// If it's not a range, turn maximum into a number.
val_1 = is_range ? parseInt(arr_0.split('to')[0], 10) : parseInt(arr_0, 10);
val_2 = is_range ? parseInt(arr_0.split('to')[1], 10) : undefined;

// Check for maxiumum or range.
if ((!val_2 && i === last && width > val_1) || (width > val_1 && width <= val_2)) {
// Build full URL to CSS file.
file && (url = path + file);

// Exit the while loop. No need to continue
// if we've already found a matching range.
break;
}
}

if (url) {
// Update css link tag, only if css url has changed
if(!url_old || url_old !== url) {
if (css) {
if(css.href !== url) {
// Create empty link tag:
// <link rel="stylesheet" />
var newCss = d.createElement('link');
newCss.rel = 'stylesheet';
newCss.media = css.media;
newCss.id = css.id;
// Apply changes.
change(i, width, newCss);

// Prevent overflowing flash of content
css_old = css;
css_old.id += '_old'; //Prevent duplicate IDs

// Preserve css load order with graceful content stepping
if(css.nextSibling)
docHead.insertBefore(newCss, css.nextSibling);
else
docHead.appendChild(newCss);
css = newCss;
} else {
// Fire callback even if css link element wasn't changed.
url_old = url;
callback(i, width);
}
} else {
// Create empty link tag:
// <link rel="stylesheet" />
css = d.createElement('link');
css.rel = 'stylesheet';
css.media = 'screen';
// Apply changes.
change(i, width, css);

// Append css to end of head
docHead.appendChild(css);
}
}

// Update css body class if it has changed
var newBodyClass = '_' + url.split('/').pop().split('.')[0];
if( newBodyClass != bodyClass ) {
// Remove bodyClass
if (bodyClass.length && docBody.classList.contains(bodyClass))
docBody.classList.remove(bodyClass);
bodyClass = newBodyClass;
// Add bodyClass
docBody.classList.add(bodyClass);
}
}
}

// Slight delay.
function react() {
// Clear the timer as window resize fires,
// so that it only calls adapt() when the
// user has finished resizing the window.
clearTimeout(timer);

// Start the timer countdown.
timer = setTimeout(adapt, 20);
// -----------------------^^
// Note: 20 milliseconds is lowest "safe"
// duration for setTimeout and setInterval.
}

// Setup adapt after DOM is loaded
if ( d.readyState === "complete" ||
( d.readyState !== "loading" && !d.documentElement.doScroll ) ) {
setupAdapt();
} else {
d.addEventListener( "DOMContentLoaded", setupAdapt );
}

// Pass in window, document, config, undefined.
})(this, this.document, ADAPT_CONFIG);
10 changes: 9 additions & 1 deletion assets/js/adapt.min.js
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