ngx-metafrenzy
Version:
Angular 13 module for setting head tags such as title, meta, and link.
142 lines • 19 kB
JavaScript
import { Injectable, Inject, ViewEncapsulation } from '@angular/core';
import { DOCUMENT } from '@angular/common';
import * as i0 from "@angular/core";
import * as i1 from "@angular/platform-browser";
export class MetafrenzyService {
constructor(title, meta, rendererFactory, document) {
this.title = title;
this.meta = meta;
this.rendererFactory = rendererFactory;
this.document = document;
}
setTitle(title) {
this.title.setTitle(title);
}
getTitle() {
return this.title.getTitle();
}
setMetaTag(name, content) {
const metaDefinition = {};
if (name.lastIndexOf('og:', 0) === 0) {
metaDefinition['property'] = name;
}
else {
metaDefinition['name'] = name;
}
metaDefinition['content'] = content;
this.meta.updateTag(metaDefinition);
}
getMetaTag(selector, returnElement) {
const tag = this.meta.getTag(selector);
if (!tag) {
return '';
}
return returnElement === true ? tag : tag.content;
}
removeMetaTag(selector) {
if (selector instanceof HTMLMetaElement) {
this.meta.removeTagElement(selector);
}
else {
this.meta.removeTag(selector);
}
}
setMetaCharsetTag(value) {
this.meta.updateTag({
charset: value
}, 'charset');
}
removeLinkTags(shouldRemoveLinkTagCb) {
const links = this.document.head.getElementsByTagName('link');
const toRemove = [];
for (let i = 0; i < links.length; i++) {
if (shouldRemoveLinkTagCb(links[i])) {
toRemove.push(links[i]);
}
}
toRemove.forEach(el => el.remove());
}
setLinkTag(tag) {
try {
const renderer = this.rendererFactory.createRenderer(this.document, {
id: '-1',
encapsulation: ViewEncapsulation.None,
styles: [],
data: {}
});
const link = renderer.createElement('link');
const head = this.document.head;
Object.keys(tag).forEach((property) => {
return renderer.setAttribute(link, property, String(tag[property]));
});
this.removeLinkTags(el => {
if ((el.getAttribute('name') !== null &&
el.getAttribute('name') === link.getAttribute('name')) ||
(el.getAttribute('rel') !== null &&
el.getAttribute('rel') === link.getAttribute('rel') &&
link.getAttribute('rel') !== 'stylesheet' &&
link.getAttribute('rel') !== 'alternate')) {
return true;
}
return false;
});
renderer.appendChild(head, link);
}
catch (e) { }
}
setAllTitleTags(title) {
this.setTitle(title);
this.setMetaTag('og:title', title);
}
setAllDescriptionTags(description) {
this.setMetaTag('description', description);
this.setMetaTag('og:description', description);
}
setCanonical(href) {
this.setLinkTag({
rel: 'canonical',
href
});
}
removeCanonical() {
this.removeLinkTags(el => el.getAttribute('rel') === 'canonical');
}
setRobots(content) {
this.setLinkTag({
rel: 'robots',
content
});
}
setOpenGraph(og) {
Object.keys(og).forEach((name) => {
this.setMetaTag('og:' + name, String(og[name]));
});
}
setTags(tags) {
if (tags.hasOwnProperty('title') && tags.title) {
this.setAllTitleTags(tags.title);
}
if (tags.hasOwnProperty('description') && tags.description) {
this.setAllDescriptionTags(tags.description);
}
if (tags.hasOwnProperty('url') && tags.url) {
this.setMetaTag('og:url', tags.url);
this.setCanonical(tags.url);
}
if (tags.hasOwnProperty('image') && tags.image) {
this.setMetaTag('og:image:url', tags.image);
}
if (tags.hasOwnProperty('robots') && tags.robots) {
this.setRobots(tags.robots);
}
}
}
MetafrenzyService.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "13.0.2", ngImport: i0, type: MetafrenzyService, deps: [{ token: i1.Title }, { token: i1.Meta }, { token: i0.RendererFactory2 }, { token: DOCUMENT }], target: i0.ɵɵFactoryTarget.Injectable });
MetafrenzyService.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "13.0.2", ngImport: i0, type: MetafrenzyService });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "13.0.2", ngImport: i0, type: MetafrenzyService, decorators: [{
type: Injectable
}], ctorParameters: function () { return [{ type: i1.Title }, { type: i1.Meta }, { type: i0.RendererFactory2 }, { type: undefined, decorators: [{
type: Inject,
args: [DOCUMENT]
}] }]; } });
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{ Injectable, RendererFactory2, Inject, ViewEncapsulation } from '@angular/core';\nimport { Meta, Title } from '@angular/platform-browser';\nimport { DOCUMENT } from '@angular/common';\n\nexport interface LinkDefinition {\n    charset?: string;\n    crossorigin?: string;\n    href?: string;\n    hreflang?: string;\n    media?: string;\n    rel?: string;\n    rev?: string;\n    sizes?: string;\n    target?: string;\n    type?: string;\n    [prop: string]: string | undefined;\n}\n\nexport interface OpenGraph {\n    title?: string;\n    description?: string;\n    type?: string;\n    url?: string;\n    image?: string;\n    site_name?: string;\n    [prop: string]: string | undefined;\n}\n\nexport interface Tags {\n    title?: string;\n    description?: string;\n    url?: string;\n    robots?: Robots;\n    image?: string;\n}\n\nexport type Robots =\n    'index,follow' | 'index,nofollow' | 'noindex,nofollow' | 'noindex,follow' |\n    'index, follow' | 'index, nofollow' | 'noindex, nofollow' | 'noindex, follow';\n\n@Injectable()\nexport class MetafrenzyService {\n\n    constructor(\n        private readonly title: Title,\n        private readonly meta: Meta,\n        private readonly rendererFactory: RendererFactory2,\n        @Inject(DOCUMENT) private document: any\n    ) {}\n\n    setTitle(title: string) {\n        this.title.setTitle(title);\n    }\n\n    getTitle(): string {\n        return this.title.getTitle();\n    }\n\n    setMetaTag(name: string, content: string) {\n        const metaDefinition: any = {};\n\n        if (name.lastIndexOf('og:', 0) === 0) {\n            metaDefinition['property'] = name;\n        } else {\n            metaDefinition['name'] = name;\n        }\n\n        metaDefinition['content'] = content;\n\n        this.meta.updateTag(metaDefinition);\n    }\n\n    getMetaTag(selector: string, returnElement?: boolean): string|HTMLMetaElement {\n        const tag = this.meta.getTag(selector);\n        if (!tag) {\n            return '';\n        }\n\n        return returnElement === true ? tag : tag.content;\n    }\n\n    removeMetaTag(selector: string|HTMLMetaElement) {\n        if (selector instanceof HTMLMetaElement) {\n            this.meta.removeTagElement(selector);\n        } else {\n            this.meta.removeTag(selector);\n        }\n    }\n\n    setMetaCharsetTag(value: string) {\n        this.meta.updateTag({\n            charset: value\n        }, 'charset');\n    }\n\n    removeLinkTags(shouldRemoveLinkTagCb: (linkTag: HTMLLinkElement) => boolean) {\n        const links: HTMLCollectionOf<HTMLLinkElement> = this.document.head.getElementsByTagName('link');\n\n        const toRemove: HTMLLinkElement[] = [];\n\n        for (let i = 0; i < links.length; i++) {\n            if (shouldRemoveLinkTagCb(links[i])) {\n                toRemove.push(links[i]);\n            }\n        }\n\n        toRemove.forEach(el => el.remove());\n    }\n\n    setLinkTag(tag: LinkDefinition) {\n        try {\n            const renderer = this.rendererFactory.createRenderer(this.document, {\n                id: '-1',\n                encapsulation: ViewEncapsulation.None,\n                styles: [],\n                data: {}\n            });\n\n            const link = renderer.createElement('link');\n            const head = this.document.head;\n\n            Object.keys(tag).forEach((property: string) => {\n                return renderer.setAttribute(link, property, String(tag[property]));\n            });\n\n            this.removeLinkTags(el => {\n                if (\n                    (el.getAttribute('name') !== null &&\n                        el.getAttribute('name') === link.getAttribute('name')) ||\n                    (el.getAttribute('rel') !== null &&\n                        el.getAttribute('rel') === link.getAttribute('rel') &&\n                        link.getAttribute('rel') !== 'stylesheet' &&\n                        link.getAttribute('rel') !== 'alternate')\n                ) {\n                  return true;\n                }\n\n                return false;\n            });\n\n            renderer.appendChild(head, link);\n        } catch (e) {}\n    }\n\n    setAllTitleTags(title: string) {\n        this.setTitle(title);\n        this.setMetaTag('og:title', title);\n    }\n\n    setAllDescriptionTags(description: string) {\n        this.setMetaTag('description', description);\n        this.setMetaTag('og:description', description);\n    }\n\n    setCanonical(href: string) {\n        this.setLinkTag({\n            rel: 'canonical',\n            href\n        });\n    }\n\n    removeCanonical() {\n      this.removeLinkTags(el => el.getAttribute('rel') === 'canonical');\n    }\n\n    setRobots(content: Robots) {\n        this.setLinkTag({\n            rel: 'robots',\n            content\n        });\n    }\n\n    setOpenGraph(og: OpenGraph) {\n        Object.keys(og).forEach((name: string) => {\n            this.setMetaTag('og:' + name, String(og[name]));\n        });\n    }\n\n    setTags(tags: Tags) {\n        if (tags.hasOwnProperty('title') && tags.title) {\n            this.setAllTitleTags(tags.title);\n        }\n\n        if (tags.hasOwnProperty('description') && tags.description) {\n            this.setAllDescriptionTags(tags.description);\n        }\n\n        if (tags.hasOwnProperty('url') && tags.url) {\n            this.setMetaTag('og:url', tags.url);\n            this.setCanonical(tags.url);\n        }\n\n        if (tags.hasOwnProperty('image') && tags.image) {\n            this.setMetaTag('og:image:url', tags.image);\n        }\n\n        if (tags.hasOwnProperty('robots') && tags.robots) {\n            this.setRobots(tags.robots);\n        }\n    }\n\n}\n"]}