3 examples of 'drawing images using ajax' in JavaScript

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function generateNewImage() {
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    // generate new random z
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    z = [];
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    N = 128;
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    SD = 1.0;
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    var trunc = 2.5;
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    for (var i=0; i

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function fetch_images() {
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    $(".exchange-logo").each(function () {
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        const element = $(this);
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        if(element.attr("src") === ""){
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            $.get(element.attr("url"), function(data) {
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                element.attr("src", data["image"]);
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                const parentLink = element.parent("a");
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                if (parentLink.attr("href") === ""){
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                    parentLink.attr("href", data["url"]);
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                }
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            });
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        }
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    });
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}

483
function doImage(err, canvas) {
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       var img = document.createElement('img');
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       var dimensions = map.getSize();
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       img.width = dimensions.x;
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       img.height = dimensions.y;
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       img.src = canvas.toDataURL("image/png");
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       var suffixe_file = $("select").val()[0];
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       var suffix;
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       auj = new Date();
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       auj.setDate(auj.getDate() - 1);
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       auj = auj.getFullYear() + '_' + parseInt(auj.getMonth() + 1) + '_' + auj.getDate(); 
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       if (suffixe_file === "1") {
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           suffix = 'centres_ebola_guinee_' + auj;
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       }
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       else if (suffixe_file === "2") {
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           suffix = 'cte_guinee_' + auj;
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       }
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       else if (suffixe_file === "3") {
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           suffix = 'cdt_guinee_' + auj;
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       }
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       else if (suffixe_file === "4") {
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           suffix = 'cts_guinee_' + auj;
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       }
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       else{
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           suffix = 'labos_guinee_' + auj;
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       };
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       $("a#print").attr("download", suffix + '.png')
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       $("a#print").attr("href", img.src)
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       $('#wheel').hide();
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       $("a#print").html("Télécharger la carte");
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       $('.dlmap').fadeIn("slow");
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   }