117 lines
3.7 KiB
JavaScript
117 lines
3.7 KiB
JavaScript
/**
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* Custom modal dialog with form support. Assumes the following structure:
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* <modal-dialog><template shadowrootmode="open">
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* <p id="prompt"></p>
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* <div id="body">
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* <form id="form"> ... </form>
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* </div>
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* <div id="controls">
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* <button value="..." form=""
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* </div>
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* </modal-dialog></template>
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* Where prompt is the modal dialog's prompt or header,
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* body contains an optional form or other information,
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* and controls contains a series of buttons which controls the form
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*/
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class ModalDialog extends HTMLElement {
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shadowRoot = null;
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dialog = null;
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constructor () {
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super();
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// setup shadowDOM
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const internals = this.attachInternals();
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this.shadowRoot = internals.shadowRoot;
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this.dialog = this.shadowRoot.querySelector("dialog");
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// add dialog handler to each control button with the return value corresponding to their value attribute
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const controls = this.shadowRoot.querySelector("#controls");
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for (const button of controls.childNodes) {
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button.addEventListener("click", async (e) => {
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e.preventDefault();
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this.dialog.close(e.target.value);
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});
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}
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this.setOnClose(); // default behavior to just close the dialog, should call setOnClose to override this behavior
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}
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showModal () {
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this.dialog.showModal();
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}
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querySelector (query) {
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return this.shadowRoot.querySelector(query);
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}
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querySelectorAll (query) {
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return this.shadowRoot.querySelectorAll(query);
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}
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setOnClose (callback = (result, form) => {}) {
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this.dialog.addEventListener("close", () => {
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const formElem = this.dialog.querySelector("form");
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const formData = formElem ? new FormData(formElem) : null;
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callback(this.dialog.returnValue, formData);
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formElem.reset();
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this.dialog.close();
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});
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}
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}
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customElements.define("modal-dialog", ModalDialog);
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export function dialog (header, body, onclose = async (result, form) => { }) {
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const dialog = document.createElement("dialog");
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dialog.innerHTML = `
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<p class="w3-large" id="prompt" style="text-align: center;"></p>
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<div id="body"></div>
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<div class="w3-center w3-container">
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<button id="cancel" value="cancel" form="form" class="w3-button w3-margin" style="background-color: var(--negative-color, #f00); color: var(--lightbg-text-color, black);" formnovalidate>CANCEL</button>
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<button id="confirm" value="confirm" form="form" class="w3-button w3-margin" style="background-color: var(--positive-color, #0f0); color: var(--lightbg-text-color, black);">CONFIRM</button>
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</div>
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`;
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dialog.className = "w3-container w3-card w3-border-0";
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dialog.querySelector("#prompt").innerText = header;
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dialog.querySelector("#body").innerHTML = body;
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dialog.addEventListener("close", async () => {
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const formElem = dialog.querySelector("form");
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const formData = formElem ? new FormData(formElem) : null;
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await onclose(dialog.returnValue, formData);
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dialog.parentElement.removeChild(dialog);
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});
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if (!dialog.querySelector("form")) {
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dialog.querySelector("#confirm").addEventListener("click", async (e) => {
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e.preventDefault();
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dialog.close(e.target.value);
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});
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dialog.querySelector("#cancel").addEventListener("click", async (e) => {
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e.preventDefault();
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dialog.close(e.target.value);
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});
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}
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document.body.append(dialog);
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dialog.showModal();
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return dialog;
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}
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export function alert (message) {
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const dialog = document.createElement("dialog");
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dialog.innerHTML = `
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<form method="dialog">
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<p class="w3-center" style="margin-bottom: 0px;">${message}</p>
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<div class="w3-center">
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<button class="w3-button w3-margin" id="submit">OK</button>
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</div>
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</form>
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`;
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dialog.className = "w3-container w3-card w3-border-0";
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document.body.append(dialog);
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dialog.showModal();
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dialog.addEventListener("close", () => {
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dialog.parentElement.removeChild(dialog);
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});
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return dialog;
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}
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