accounts-frontend/packages/app/services/loader.js

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// On page initialization loader is already visible, so initial value is 1
let stack = 1;
export default {
show() {
if (++stack >= 0) {
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const loader = document.getElementById('loader');
if (!loader) {
throw new Error('Can not find loader element');
}
loader.classList.add('is-active');
}
},
hide() {
if (--stack <= 0) {
stack = 0;
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const loader = document.getElementById('loader');
if (!loader) {
throw new Error('Can not find loader element');
}
loader.classList.remove('is-active', 'is-first-launch');
}
},
};