JavaScript中如何保存输入到本地

function saveSqlToLocal() {
            var textToSave = sqlEditor.getValue();
            var textToSaveAsBlob = new Blob([textToSave], { type: "text/plain" });
            var textToSaveAsUrl = window.URL.createObjectURL(textToSaveAsBlob);
            var downloadLink = document.createElement("a");
            downloadLink.download ="文件名";
            downloadLink.href = textToSaveAsUrl;
            downloadLink.onclick = destroyClickedElement;
            downloadLink.style.display = "none";
            document.body.appendChild(downloadLink);

            downloadLink.click();
        };~~~