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form.js
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form.js
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import { Behavior, fireEvents, registerBehavior } from "./index";
class FormBehavior extends Behavior {
constructor(element) {
super(element);
element.addEventListener("submit", this.onSubmit.bind(this));
}
async onSubmit(event) {
event.preventDefault();
const url = this.element.action;
const formData = new FormData(this.element);
if (event.submitter) {
formData.append(event.submitter.name, event.submitter.value);
}
await fetch(url, {
method: "POST",
body: formData,
redirect: "manual", // ignore redirect
});
const events = this.element.getAttribute("ld-fire");
if (fireEvents) {
fireEvents(events);
}
}
}
class AutoSubmitBehavior extends Behavior {
constructor(element) {
super(element);
element.addEventListener("change", () => {
const form = element.closest("form");
form.dispatchEvent(new Event("submit", { cancelable: true }));
});
}
}
class UploadButton extends Behavior {
constructor(element) {
super(element);
const fileInput = element.nextElementSibling;
element.addEventListener("click", () => {
fileInput.click();
});
fileInput.addEventListener("change", () => {
const form = fileInput.closest("form");
const event = new Event("submit", { cancelable: true });
event.submitter = element;
form.dispatchEvent(event);
});
}
}
registerBehavior("ld-form", FormBehavior);
registerBehavior("ld-auto-submit", AutoSubmitBehavior);
registerBehavior("ld-upload-button", UploadButton);