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gatsby-browser.js
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gatsby-browser.js
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/**
* Implement Gatsby's Browser APIs in this file.
*
* See: https://www.gatsbyjs.org/docs/browser-apis/
*/
import "prismjs/themes/prism-tomorrow.css";
import "prismjs/plugins/line-numbers/prism-line-numbers.css";
import "prismjs/plugins/command-line/prism-command-line.css";
// onPreRouteUpdate() and onRouteUpdate() are called before onInitialClientRender,
// use initialized flag to ensure that window.onGatsbyPreRouteUpdate() and
// window.onGatsbyRouteUpdate() will not be called before
// window.onGatsbyInitialClientRender() has run
let initialized = false;
export const onInitialClientRender = () => {
initialized = true;
if ("onGatsbyInitialClientRender" in window && typeof window.onGatsbyInitialClientRender === "function") {
window.onGatsbyInitialClientRender();
}
if ("onGatsbyRouteUpdate" in window && typeof window.onGatsbyRouteUpdate === "function") {
window.onGatsbyRouteUpdate();
}
};
export const onRouteUpdate = () => {
if (initialized && "onGatsbyRouteUpdate" in window && typeof window.onGatsbyRouteUpdate === "function") {
window.onGatsbyRouteUpdate();
}
};
export const onPreRouteUpdate = () => {
if (initialized && "onGatsbyPreRouteUpdate" in window && typeof window.onGatsbyPreRouteUpdate === "function") {
window.onGatsbyPreRouteUpdate();
}
};