:curPage="defineCurPage":cur-page="defineCurPage".
const getImg = url => fetch(url)
.then(r => r.blob())
.then(blob => new Promise(resolve => {
const reader = new FileReader();
reader.addEventListener('loadend', () => resolve({ image: reader.result }));
reader.readAsDataURL(blob);
}));
document.querySelector('button').addEventListener('click', async () => {
const arrImg = await Promise.all(arr.map(n => getImg(`./images/${n}`)));
console.log(arrImg);
});data: () => ({
newTask: '',
items: {},
}),
watch: {
items: {
deep: true,
handler: val => localStorage.setItem('items', JSON.stringify(val)),
},
},
methods: {
addTask() {
const title = this.newTask.trim();
if (title) {
const id = 1 + Math.max(0, ...Object.values(this.items).flat().map(n => n.id));
this.items.A.push({ id, title });
} else {
alert('Введите текст задачи');
}
this.newTask = '';
},
},
created() {
let items = null;
try {
items = JSON.parse(localStorage.getItem('items'));
} catch (e) {}
this.items = items || дефолтное значение;
},<div>
<input placeholder="текст задачи" v-model="newTask">
<button @click="addTask">+</button>
</div>
<draggable
v-for="(v, k) in items"
v-model="items[k]"
:key="k"
:options="{ group: 'tasks' }"
element="ul"
class="connectedSortable"
>
<li v-for="item in v" :key="item.id">{{ item.title }}</li>
</draggable>const $items = $('.card');
const openedClass = 'card--opened';
const closedClass = 'card--closed';
const delay = 500;
const flip = $item => $item.removeClass(closedClass).addClass(openedClass);$items.each((i, n) => setTimeout(flip, (i + 1) * delay, $(n)));(function next(i) {
if (i < $items.length) {
setTimeout(() => {
flip($items.eq(i));
next(-~i);
}, delay);
}
})(0);let i = -1;
const intervalID = setInterval(() => {
if (++i >= $items.length) {
clearInterval(intervalID);
} else {
flip($items.eq(i));
}
}, delay);const obj = array.reduce((acc, n, i) => (
acc[`filter${i + 1}`] = { ...baseFilter, prop: n },
acc
), {});const obj = {};
for (const [ i, n ] of array.entries()) {
(obj['filter' + (-~i)] = Object.assign({}, baseFilter)).prop = n;
}const obj = {};
for (let i = 0; i < array.length;) {
const subobj = { prop: array[i] };
for (const k in baseFilter) {
subobj[k] = baseFilter[k];
}
obj['filter'.concat(++i)] = subobj;
}const itemsSelector = '.block';
const wrapperTag = 'div';
const wrapperClass = 'parent';const $items = $(itemsSelector);
$items.each(i => $items
.eq(i)
.nextUntil($items.get(i + 1))
.wrapAll(`<${wrapperTag} class="${wrapperClass}">`)
);document.querySelectorAll(itemsSelector).forEach((n, i, a) => {
const elems = [];
for (let el = n; (el = el.nextElementSibling) != a[-~i]; elems.push(el)) ;
n.after(document.createElement(wrapperTag));
n.nextSibling.classList.add(wrapperClass);
n.nextSibling.append(...elems);
});$filtered = array_slice(array_filter($search_results, function($n) {
return условие;
}), 0, 5);$filtered = [];
foreach ($search_results as $n) {
if (условие) {
$filtered[] = $n;
}
if (count($filtered) === 5) {
break;
}
}const [ arr1, arr2 ] = arr.list
.map(n => [ n, +n.pos.dv.slice(1) ])
.sort((a, b) => a[1] - b[1])
.reduce((acc, n) => (acc[+(n[1] >= 38)].push(n[0]), acc), [ [], [] ])
.map(n => ({ list: n }));.red {
background: red;
}$('.table').on('change', function(e) {
const $tr = $(e.target).closest('tr');
const ajaxdata = $tr.find('.ajaxdata').val();
const subcat = $tr.find('.subcat').val();
$tr.toggleClass('red', ajaxdata === 'none' && subcat === 'none');
}).find('tr').change();
// или
const table = document.querySelector('table');
table.addEventListener('change', e => {
const tr = e.target.closest('tr');
const ajaxdata = tr.querySelector('.ajaxdata').value;
const subcat = tr.querySelector('.subcat').value;
tr.classList.toggle('red', ajaxdata === 'none' && subcat === 'none');
})
table.querySelectorAll('tr').forEach(n => {
n.dispatchEvent(new Event('change', { bubbles: true }));
});item.isShow = false;this.$set(item, 'isShow', false);data() {
return {
apiCopy: this.api.map(n => ({
...n,
requests: n.requests.map(m => ({
...m,
isShow: false,
})),
})),
};
},const mustStay = arr => arr.every(n => n.value !== '-');const newArr = arr.filter(mustStay);
// или
const newArr = [];
for (const n of arr) {
if (mustStay(n)) {
newArr.push(n);
}
}
// или
const newArr = [];
for (let i = 0; i < arr.length; i++) {
if (mustStay(arr[i])) {
newArr[newArr.length] = arr[i];
}
}
// или
const newArr = (function get(i, n = arr[i]) {
return n
? [ mustStay(n) ? [ n ] : [], get(i + 1) ].flat()
: [];
})(0)for (let i = 0; i < arr.length; i++) {
if (!mustStay(arr[i])) {
for (let j = i--; ++j < arr.length; arr[j - 1] = arr[j]) ;
arr.pop();
}
}
// или
arr.reduceRight((_, n, i, a) => mustStay(n) || a.splice(i, 1), null);
// или
arr.splice(0, arr.length, ...arr.filter(mustStay));
// или
arr.length -= arr.reduce((acc, n, i, a) => (
a[i - acc] = n,
acc + !mustStay(n)
), 0);const length = Math.max(...arr.map(n => n.length));
// или
const length = arr.reduce((max, { length: n }) => max > n ? max : n, 0);for (const n of arr) {
const id = 1 + Math.max(0, ...n.map(m => m.id));
n.push(...Array.from(
{ length: length - n.length },
(_, i) => ({ id: id + i, value: '_' })
));
}const newArr = arr.map(n => Array.from({ length }, (_, i) => ({
id: i + 1,
value: i < n.length ? n[i].value : '-',
})));[ 7, 7, 7, 0, 1, 1 ]? В первом случае 2 - повторяются семёрка и единица, во втором 5 - три семёрки плюс две единицы.const duplicateCount = Object
.values(arr.reduce((acc, n) => (acc[n] = (acc[n] || 0) + 1, acc), {}))
.filter(n => n > 1)
.length;
// или
const duplicateCount = Array
.from(arr.reduce((acc, n) => acc.set(n, acc.has(n)), new Map).values())
.reduce((acc, n) => acc + n, 0);
// или
const duplicateCount = new Set(arr.filter((n, i, a) => i !== a.indexOf(n))).size;const duplicateCount = Object
.values(arr.reduce((acc, n) => (acc[n] = acc.hasOwnProperty(n), acc), {}))
.reduce((acc, n) => acc - !n, arr.length);
// или
const duplicateCount = Array
.from(arr.reduce((acc, n) => acc.set(n, -~acc.get(n)), new Map).values())
.reduce((acc, n) => acc + (n > 1) * n, 0);
// или
const duplicateCount = arr
.filter((n, i, a) => a.indexOf(n) !== a.lastIndexOf(n))
.length;const isArrOK = arr => arr.length && arr.every(n => n.value !== '-');const newArr = arr.reduce((acc, { arr: n }) => (
isArrOK(n) && acc.push(n),
acc
), []);
// или
const newArr = arr.map(n => n.arr).filter(isArrOK);
// или
const newArr = [];
for (const n of arr) {
if (isArrOK(n.arr)) {
newArr[newArr.length] = n.arr;
}
}$('#file').on('change', ({ target: { files: [ file ] } }) => {
$('#info-file').html([ 'name', 'size', 'type' ]
.map(n => `<div>${n}: ${file[n]}</div>`)
.join('')
);
});<div class="nav">
<div class="nav-inner"></div>
</div>.nav {
height: 20px;
background: #ddd;
}
.nav-inner {
height: 100%;
background: red;
transition: width 0.5s;
}const updateNav = slide => $navInner.width(`${(slide + 1) / slidesCount * 100}%`);$slick.on({
init: (e, slick) => updateNav(slick.currentSlide),
beforeChange: (e, slick, currSlide, nextSlide) => updateNav(nextSlide),
})$nav.on('click', function(e) {
$slick.slick('slickGoTo', e.offsetX / $nav.width() * slidesCount | 0);
});как сделать так, чтобы width полосы высчитывался в зависимости от slidesToShow
slidesCount надо заменить на slidesCount - slidesToShow + 1.
Насколько хороши варианты:
1. интервалом синхронить стейт корзины.
2. Синхронить стейт при событии onunload
3. Писать обработчик кликов, который будет регулировать частоту запросов (очень не хочется)
methods: {
syncCart: debounce(function() {
...
}),
},
watch: {
'$store.state.cart': {
immediate: true,
deep: true,
handler: 'syncCart',
},
},