const imageToBase64 = (img) => {
    var canvas = document.createElement("canvas");
    canvas.width = img.width;
    canvas.height = img.height;
    var ctx = canvas.getContext("2d");
    console.log(img, canvas)
    ctx.drawImage(img, 0, 0, img.width, img.height);
    var ext = img.src.substring(img.src.lastIndexOf(".") + 1).toLowerCase();
    var dataURL = canvas.toDataURL("image/" + ext);
    return dataURL;
}

export const downloadImg = (fileName) => {
    const url = '/assets/files/common/' + fileName
    var image = new Image();
    image.crossOrigin = '';
    image.src = url;
    image.onload = function () {
        let base64 = imageToBase64(image); //图片转base64
        const link = document.createElement('a')
        link.style.display = 'none'
        //设置下载的图片名称
        link.download = fileName
        link.href = base64
        document.body.appendChild(link)
        link.click()
        document.body.removeChild(link)
    }
}



export const markRedKeywords = (str, key) => {
    var reg = new RegExp((`(${key})`), "gi");
    var replace = '<span style="color:#FD463E;font-weight:bold;margin-right:0px;">$1</span>';
    return str.replace(reg, replace);
}