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setAttr.ts
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setAttr.ts
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/*
* Copyright 2019 LABOR.digital
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Last modified: 2019.05.07 at 18:22
*/
import type {PlainObject} from '../Interfaces/PlainObject';
import {forEach} from '../Lists/forEach';
import {isBool} from '../Types/isBool';
import {isNumber} from '../Types/isNumber';
import {isPlainObject} from '../Types/isPlainObject';
import {isString} from '../Types/isString';
import {isUndefined} from '../Types/isUndefined';
/**
* Routes either a single element or a node list of elements to the attrWriter
* @param element
* @param attributeName
* @param value
*/
function attrSetSingle(
element: HTMLElement | Element | NodeListOf<Element>,
attributeName: string,
value: string | number | boolean | null
): void
{
if (element instanceof Element) {
attrWriter(element as HTMLElement, attributeName, value);
} else {
forEach(element, (e) => attrWriter(e, attributeName, value));
}
}
/**
* Handles the adding and removal of a single attribute on a given element
* @param element
* @param attributeName
* @param value
*/
function attrWriter(
element: HTMLElement | Element,
attributeName: string,
value: string | number | boolean | null
): void
{
if (!attributeName || !(element instanceof HTMLElement)) {
return;
}
if (value === null) {
element.removeAttribute(attributeName);
} else {
element.setAttribute(attributeName, attrSerializer(value));
}
}
/**
* Helper to convert a given value into a string
* @param value
*/
function attrSerializer(value: string | number | boolean | null): string
{
if (isString(value)) {
return value as string;
}
if (isBool(value)) {
return value ? 'true' : 'false';
}
if (isNumber(value)) {
return value + '';
}
if (value !== null && !isUndefined(value)) {
return JSON.stringify(value);
}
return value + '';
}
/**
* Sets / removes a given attribute from the list of given elements
* @param element the element / elements to set or remove the attribute for
* @param attributes An object where key is the name of the attribute and value is the value to set
*/
export function setAttr(
element: HTMLElement | Element | NodeListOf<Element>,
attributes: PlainObject<string | number | boolean | null>
): void
/**
* Sets / removes a given attribute from the list of given elements
* @param element the element / elements to set or remove the attribute for
* @param attributeName The attribute to set / remove
* @param value If null is given the attribute will be removed, otherwise the attribute will be set to this value
*/
export function setAttr(
element: HTMLElement | Element | NodeListOf<Element>,
attributeName: string,
value: string | number | boolean | null
): void
/**
* Sets / removes a given attribute from the list of given elements
* @param element the element / elements to set or remove the attribute for
* @param a
* @param b
*/
export function setAttr(
element: HTMLElement | Element | NodeListOf<Element>,
a: string | PlainObject<string | number | boolean | null>,
b?: string | number | boolean | null
): void
{
if (!element) {
return;
}
if (isPlainObject(a)) {
forEach(a, (v, k) => attrSetSingle(element, k, v));
} else {
attrSetSingle(element, a, b ?? null);
}
}