| 1 | import $ from 'tealight';
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| 2 | import Assert from './assert';
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| 3 |
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| 4 | export function prevHandler(pageIndex) {
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| 5 | let ias = this;
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| 6 | let prevEl = ias._prevEl || $(ias.options.prev, document.body)[0];
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| 7 |
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| 8 | if (ias.options.prev === undefined) {
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| 9 | return;
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| 10 | }
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| 11 |
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| 12 | if (!prevEl) {
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| 13 | Assert.warn(Assert.singleElement, ias.options.prev, 'options.prev');
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| 14 |
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| 15 | return;
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| 16 | }
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| 17 |
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| 18 | let prevUrl = prevEl.href;
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| 19 |
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| 20 | return ias.load(prevUrl)
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| 21 | .then((data) => {
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| 22 | let prevEl = ias._prevEl = $(ias.options.prev, data.xhr.response)[0];
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| 23 |
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| 24 | return ias.prepend(data.items)
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| 25 | .then(() => !!prevEl)
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| 26 | });
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| 27 | }
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