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fix(runtime): add fallback for missing head element #145

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fix(runtime): add fallback for missing head element #145

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14 changes: 12 additions & 2 deletions runtime/inject-css.js
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Original file line number Diff line number Diff line change
Expand Up @@ -12,7 +12,7 @@ var styleTags = [];
* @param {Record<string,string>} [options.attributes]
* @returns {void}
*/
export default function (css, options) {
var styleInjector = function (css, options) {
if (!css || typeof document === "undefined") return;

var position = options.prepend === true ? "prepend" : "append";
Expand All @@ -23,6 +23,14 @@ export default function (css, options) {
? document.querySelector(options.container)
: document.getElementsByTagName("head")[0];

// Fallback if container is not available yet
if (!container && document.readyState === "loading") {
document.addEventListener("DOMContentLoaded", function () {
styleInjector(css, options);
});
return;
}

function createStyleTag() {
var styleTag = document.createElement("style");
styleTag.setAttribute("type", "text/css");
Expand Down Expand Up @@ -65,4 +73,6 @@ export default function (css, options) {
} else {
styleTag.appendChild(document.createTextNode(css));
}
}
};

export default styleInjector;