49 lines
1.1 KiB
JavaScript
49 lines
1.1 KiB
JavaScript
function loadTemplateAsync(path) {
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const result = new Promise(resolve => {
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const xhttp = new XMLHttpRequest()
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xhttp.onreadystatechange = function () {
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if (this.readyState == 4) {
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if (this.status == 200) resolve(this.responseText)
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if (this.status == 404) resolve(`<div>Page not found: ${path}</div>`)
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}
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}
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xhttp.open('GET', path, true)
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xhttp.send()
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})
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return result
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}
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function imgSizeFit(img, maxWidth = 1024, maxHeight = 768) {
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let ratio = Math.min(
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1,
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maxWidth / img.naturalWidth,
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maxHeight / img.naturalHeight
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)
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return {width: img.naturalWidth * ratio, height: img.naturalHeight * ratio}
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}
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async function hash(string) {
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const utf8 = new TextEncoder().encode(string)
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const hashBuffer = await crypto.subtle.digest('SHA-256', utf8)
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const hashArray = Array.from(new Uint8Array(hashBuffer))
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const hashHex = hashArray
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.map(bytes => bytes.toString(16).padStart(2, '0'))
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.join('')
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return hashHex
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}
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function isJson(str) {
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if (typeof str !== 'string') {
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return false
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}
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try {
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JSON.parse(str)
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return true
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} catch (error) {
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return false
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}
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}
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