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Fix synchronously loading/applying stylesheets on page load. #2575

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merged 1 commit into from
Apr 29, 2015
Merged

Fix synchronously loading/applying stylesheets on page load. #2575

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11 changes: 5 additions & 6 deletions lib/less-browser/bootstrap.js
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Original file line number Diff line number Diff line change
Expand Up @@ -13,14 +13,13 @@ require("./add-default-options")(window, options);

var less = module.exports = require("./index")(window, options);

window.less = less;

if (options.onReady) {
if (/!watch/.test(window.location.hash)) {
less.watch();
}

less.pageLoadFinished = less.registerStylesheets().then(
function () {
return less.refresh(less.env === 'development');
}
);
}
less.registerStylesheetsImmediately();
less.pageLoadFinished = less.refresh(less.env === 'development');
}
30 changes: 19 additions & 11 deletions lib/less-browser/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -187,20 +187,28 @@ module.exports = function(window, options) {
less.unwatch = function () {clearInterval(less.watchTimer); this.watchMode = false; return false; };

//
// Get all <link> tags with the 'rel' attribute set to "stylesheet/less"
// Synchronously get all <link> tags with the 'rel' attribute set to
// "stylesheet/less".
//
less.registerStylesheets = function() {
return new Promise(function(resolve, reject) {
var links = document.getElementsByTagName('link');
less.sheets = [];

for (var i = 0; i < links.length; i++) {
if (links[i].rel === 'stylesheet/less' || (links[i].rel.match(/stylesheet/) &&
(links[i].type.match(typePattern)))) {
less.sheets.push(links[i]);
}
less.registerStylesheetsImmediately = function() {
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you don't call less.registerStylesheetsImmediately from anywhere? and you have removed the call to less.registerStylesheets and that isn't called anywhere..

I guess you just need to call less.registerStylesheetsImmediately from bootstrap ?

otherwise, many thanks for tracking it down and fixing.

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This is the GitHub bug I mentioned in issue #2317. The line is actually there, right above the less.refresh call and promise assignment in bootstrap.js. However, GitHub appears to have a bug in the diff viewer where a delete line at the end of a file + adding a missing trailing newline to the file + adding a line results in that line getting skipped. I've already let GitHub know about it.

This is what the diff looks like for the change:

--- a/lib/less-browser/bootstrap.js
+++ b/lib/less-browser/bootstrap.js
@@ -13,14 +13,13 @@ require("./add-default-options")(window, options);

 var less = module.exports = require("./index")(window, options);

+window.less = less;
+
 if (options.onReady) {
     if (/!watch/.test(window.location.hash)) {
         less.watch();
     }

-    less.pageLoadFinished = less.registerStylesheets().then(
-        function () {
-            return less.refresh(less.env === 'development');
-        }
-    );
-}
\ No newline at end of file
+    less.registerStylesheetsImmediately();
+    less.pageLoadFinished = less.refresh(less.env === 'development');
+}

If you clone my tree and git show the commit, you'll see the line is there.

Also, would you mind trying to restart the Travis-CI build? They had some problems last night with random stalls, which was randomly affecting different builds at different points during the build process, triggering failures of 3 different types that I had noticed. Hoping that was some temporary issue on their end related to their failed upgrade and rollbacks.

var links = document.getElementsByTagName('link');
less.sheets = [];

for (var i = 0; i < links.length; i++) {
if (links[i].rel === 'stylesheet/less' || (links[i].rel.match(/stylesheet/) &&
(links[i].type.match(typePattern)))) {
less.sheets.push(links[i]);
}
}
};

//
// Asynchronously get all <link> tags with the 'rel' attribute set to
// "stylesheet/less", returning a Promise.
//
less.registerStylesheets = function() {
return new Promise(function(resolve, reject) {
less.registerStylesheetsImmediately();
resolve();
});
};
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