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66 lines
1.4 KiB
66 lines
1.4 KiB
export function Now() {
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return window.performance
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? window.performance.now() / 1000
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: Date.now() / 1000
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}
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export function Fill(array, value) {
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if (array.fill) {
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array.fill(value)
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} else {
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for (let i = 0; i < array.length; i++) {
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array[i] = value
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}
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}
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}
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export function Base64ToArrayBuffer(base64) {
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const binary = window.atob(base64)
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const length = binary.length
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const bytes = new Uint8Array(length)
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for (let i = 0; i < length; i++) {
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bytes[i] = binary.charCodeAt(i)
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}
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return bytes.buffer
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}
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/**
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*
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* @param {object} param
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* @param {string|object|Array} param.data 数据，传入后url参数将被忽略
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* @param {string} param.url 文件下载地址
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* @param {string} param.name 文件名称
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* @param {string} param.mimeType 文件mime类型
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* @returns
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*/
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export function download(blob, name = 'JSMpeg_' + Date.now(), mimeType = '') {
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if (!blob) return
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const a = document.createElement('a')
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a.style.display = 'none'
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a.download = name
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if (typeof blob === 'string') {
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a.href = blob
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} else {
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blob =
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blob instanceof Blob
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? blob
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: new Blob(blob instanceof Array ? blob : [blob], {
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type: mimeType
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})
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a.href = URL.createObjectURL(blob)
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}
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setTimeout(() => {
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a.click()
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}, 0)
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setTimeout(() => {
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a.remove()
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}, 1)
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if (blob instanceof Blob) {
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setTimeout(() => {
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URL.revokeObjectURL(blob)
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}, 1000)
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}
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}
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