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fix(form-core): make sure .formElements stays in sync with dom order

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This commit is contained in:
Thomas Allmer 2020-11-18 08:38:29 +01:00
parent 1412032607
commit 4bacc17b16
3 changed files with 25 additions and 8 deletions
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5
.changeset/soft-walls-swim.md Normal file
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@ -0,0 +1,5 @@
---
'@lion/form-core': patch
---
Adding form elements at the top of a form now adds them to the beginning of the `.formElements` to keep it in sync with the dom order.

2
packages/form-core/src/registration/FormRegistrarMixin.js
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@ -80,7 +80,7 @@ const FormRegistrarMixinImplementation = superclass =>
child.__parentFormGroup = this;
// 1. Add children as array element
if (indexToInsertAt > 0) {
if (indexToInsertAt >= 0) {
this.formElements.splice(indexToInsertAt, 0, child);
} else {
this.formElements.push(child);

26
packages/form-core/test-suites/FormRegistrationMixins.suite.js
View file

@ -133,25 +133,37 @@ export const runRegistrationSuite = customConfig => {
it('adds elements to formElements in the right order (DOM)', async () => {
const el = /** @type {RegistrarClass} */ (await fixture(html`
<${parentTag}>
<${childTag}></${childTag}>
<${childTag}></${childTag}>
<${childTag}></${childTag}>
<${childTag} pos="0"></${childTag}>
<${childTag} pos="1"></${childTag}>
<${childTag} pos="2"></${childTag}>
</${parentTag}>
`));
/** INSERT field before the pos=1 */
/**
* @typedef {Object.<string, string>} prop
*/
const newField = /** @type {RegisteringClass & prop} */ (await fixture(html`
<${childTag}></${childTag}>
`));
newField.myProp = 'test';
newField.setAttribute('pos', 'inserted-before-1');
el.insertBefore(newField, el.children[1]);
expect(el.formElements.length).to.equal(4);
const secondChild = /** @type {RegisteringClass & prop} */ (el.children[1]);
expect(secondChild.myProp).to.equal('test');
expect(el.formElements[1].myProp).to.equal('test');
expect(secondChild.getAttribute('pos')).to.equal('inserted-before-1');
expect(el.formElements[1].getAttribute('pos')).to.equal('inserted-before-1');
/** INSERT field before the pos=0 (e.g. at the top) */
const topField = /** @type {RegisteringClass & prop} */ (await fixture(html`
<${childTag}></${childTag}>
`));
topField.setAttribute('pos', 'inserted-before-0');
el.insertBefore(topField, el.children[0]);
// expect(el.formElements.length).to.equal(5);
const firstChild = /** @type {RegisteringClass & prop} */ (el.children[0]);
expect(firstChild.getAttribute('pos')).to.equal('inserted-before-0');
expect(el.formElements[0].getAttribute('pos')).to.equal('inserted-before-0');
});
describe('FormRegistrarPortalMixin', () => {