Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Inject styles into Shadow DOM when inside Shadow DOM (#5763) #6556

Merged
merged 1 commit into from Oct 25, 2019
Merged

Inject styles into Shadow DOM when inside Shadow DOM (#5763) #6556

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Jump to
Jump to file
Failed to load files.
Diff view
Diff view
44 changes: 24 additions & 20 deletions src/platforms/platform.dom.js
View file
Open in desktop
Expand Up @@ -294,17 +294,22 @@ function removeResizeListener(node) {
}
}

function injectCSS(platform, css) {
/**
* Injects CSS styles inline if the styles are not already present.
* @param {HTMLDocument|ShadowRoot} rootNode - the node to contain the <style>.
* @param {string} css - the CSS to be injected.
*/
function injectCSS(rootNode, css) {
// https://stackoverflow.com/q/3922139
var style = platform._style || document.createElement('style');
if (!platform._style) {
platform._style = style;
var expando = rootNode[EXPANDO_KEY] || (rootNode[EXPANDO_KEY] = {});
if (!expando.containsStyles) {
expando.containsStyles = true;
css = '/* Chart.js */\n' + css;
var style = document.createElement('style');
style.setAttribute('type', 'text/css');
document.getElementsByTagName('head')[0].appendChild(style);
style.appendChild(document.createTextNode(css));
rootNode.appendChild(style);
}

style.appendChild(document.createTextNode(css));
}

module.exports = {
Expand All @@ -325,18 +330,18 @@ module.exports = {
_enabled: typeof window !== 'undefined' && typeof document !== 'undefined',

/**
* Initializes resources that depend on platform options.
* @param {HTMLCanvasElement} canvas - The Canvas element.
* @private
*/
_ensureLoaded: function() {
if (this._loaded) {
return;
}

this._loaded = true;

// https://github.com/chartjs/Chart.js/issues/5208
_ensureLoaded: function(canvas) {
if (!this.disableCSSInjection) {
injectCSS(this, stylesheet);
// If the canvas is in a shadow DOM, then the styles must also be inserted
// into the same shadow DOM.
// https://github.com/chartjs/Chart.js/issues/5763
var root = canvas.getRootNode();
var targetNode = root.host ? root : document.head;
injectCSS(targetNode, stylesheet);
}
},

Expand All @@ -358,10 +363,6 @@ module.exports = {
// https://github.com/chartjs/Chart.js/issues/2807
var context = item && item.getContext && item.getContext('2d');

// Load platform resources on first chart creation, to make possible to change
// platform options after importing the library (e.g. `disableCSSInjection`).
this._ensureLoaded();

// `instanceof HTMLCanvasElement/CanvasRenderingContext2D` fails when the item is
// inside an iframe or when running in a protected environment. We could guess the
// types from their toString() value but let's keep things flexible and assume it's
Expand All @@ -370,6 +371,9 @@ module.exports = {
// https://github.com/chartjs/Chart.js/issues/4102
// https://github.com/chartjs/Chart.js/issues/4152
if (context && context.canvas === item) {
// Load platform resources on first chart creation, to make it possible to
// import the library before setting platform options.
this._ensureLoaded(item);
initCanvas(item, config);
return context;
}
Expand Down