var formData = new FormData($("#form", iframeWindow.document)[0]);
var json = {a: 1,b:2,c:3};
Object.keys(json).forEach(key => {
formData.append("json["+ key +"]", json[key]);
})
var formData = new FormData($("#form", iframeWindow.document)[0]);
var json = {a: 1,b:2,c:3};
Object.keys(json).forEach(key => {
formData.append("json["+ key +"]", json[key]);
})
本文标题：FormData append json对象
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