Greasy Fork

Does anybody tried to make export-import of script settings? If yes, can you share base ideas behind your implementation?
I'd prefer solutions that don't involve GM functions.

solutions that don't involve GM functions

Local storage

Local storage is for storing settings inside browser. I'm asking about exporting from browser to, say, file and then importing back.

I use this function to export the script settings:

  function downFile(fileName, fileContent) {
    let elementA = document.createElement("a");
    elementA.setAttribute(
      "href",
      "data:text/plain;charset=utf-8," + encodeURIComponent(JSON.stringify(fileContent))
    );
    elementA.setAttribute("download", fileName);
    elementA.style.display = "none";
    document.body.appendChild(elementA);
    elementA.click();
    document.body.removeChild(elementA);
  }

/* example */
downFile('BLTH_CONFIG.json', exportJson);

Then import the setting like this:

// html
<button data-action="importConfig" class="igiftMsg_btn">import setting</button>
<input type="file" id="BLTH_config_file" style="display:none"> /* file button */

//js 
const inputConfig = $("#BLTH_config_file"); 
inputConfig.on("change", importConfig);
/* When user click this button, trigger the invisible file button.
 * I do it in this way because the file button is too ugly.
*/

  function importConfig() {
    let selectedFile = document.getElementById("BLTH_config_file").files[0];
    let reader = new FileReader();
    reader.readAsText(selectedFile);
    reader.onload = function () {
      console.log("importConfig：", this.result);
      try {
        // some code
      } catch (e) {
        // handle error
      }
    };
  }

@andywang, thanx. I took your idea as baseline.