关于javascript:js保存图片兼容ie

应用window.navigator.userAgent获取浏览器你内核，而后判断是不是ie/edge内核

// 判断浏览器类型function myBrowser() {    var sBrowser = null    var sUsrAg = window.navigator.userAgent    if (sUsrAg.indexOf('Firefox') > -1) {        sBrowser = 'FF'    } else if (sUsrAg.indexOf('Opera') > -1 || sUsrAg.indexOf('OPR') > -1) {        sBrowser = 'Opera'    } else if (sUsrAg.indexOf('Trident') > -1) {        sBrowser = 'IE'    } else if (sUsrAg.indexOf('Edge') > -1) {        sBrowser = 'Edge'    } else if (sUsrAg.indexOf('Chrome') > -1) {        sBrowser = 'Chrome'    } else if (sUsrAg.indexOf('Safari') > -1) {        sBrowser = 'Safari'    } else {        sBrowser = 'unknown'    }    return sBrowser}

如果是ie/edge内核

// IE浏览器图片保留本地function SaveAs5(url, fileName) {    var bstr = atob(url.split(',')[1])    var n = bstr.length    var u8arr = new Uint8Array(n)    while (n--) {        u8arr[n] = bstr.charCodeAt(n)    }    var blob = new Blob([u8arr])    window.navigator.msSaveOrOpenBlob(blob, fileName)}

其余浏览器

// 谷歌，360极速等浏览器下载function download(src, fileName) {    var aLink = document.createElement('a');    aLink.download = fileName;    aLink.href = src     aLink.click();};

残缺js代码

// 下载前先判断浏览器的内核function oDownLoad(url, fileName) {    if (myBrowser() == "IE" || myBrowser() == "Edge") {        SaveAs5(url, fileName);    } else {        download(url, fileName);    }}// IE浏览器图片保留本地function SaveAs5(url, fileName) {    var bstr = atob(url.split(',')[1])    var n = bstr.length    var u8arr = new Uint8Array(n)    while (n--) {        u8arr[n] = bstr.charCodeAt(n)    }    var blob = new Blob([u8arr])    window.navigator.msSaveOrOpenBlob(blob, fileName)}// 谷歌，360极速等浏览器下载function download(src, fileName) {    //须要转成blob，base64下载大图会超出href的限度，导致下载失败    var aLink = document.createElement('a');    aLink.download = fileName;    // var blob = dataURLtoBlob(src);    aLink.href = src // URL.createObjectURL(blob);    aLink.click();};// 判断浏览器类型function myBrowser() {    var sBrowser = null    var sUsrAg = window.navigator.userAgent    if (sUsrAg.indexOf('Firefox') > -1) {        sBrowser = 'FF'    } else if (sUsrAg.indexOf('Opera') > -1 || sUsrAg.indexOf('OPR') > -1) {        sBrowser = 'Opera'    } else if (sUsrAg.indexOf('Trident') > -1) {        sBrowser = 'IE'    } else if (sUsrAg.indexOf('Edge') > -1) {        sBrowser = 'Edge'    } else if (sUsrAg.indexOf('Chrome') > -1) {        sBrowser = 'Chrome'    } else if (sUsrAg.indexOf('Safari') > -1) {        sBrowser = 'Safari'    } else {        sBrowser = 'unknown'    }    return sBrowser}// 间接援用oDownLoad(base64文件,'aa.jpg')

dataURLtoBlob 你们可能用不了，想其余办法转吧