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Add overwrite property #2

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Add overwrite property #2

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59 changes: 38 additions & 21 deletions src/meta_tags.js
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Original file line number Diff line number Diff line change
Expand Up @@ -28,16 +28,25 @@ class MetaTags extends Component {
static contextTypes = {
extract: PropTypes.func
}
getChildren() {
if(!this.props.overwrite) return this.props.children;

return React.Children.map(this.props.children, child => React.cloneElement(child, {
'data-source': 'react-meta-tags'
})
)
}
extractChildren() {
const {extract} = this.context;

if (extract) {
extract(this.props.children);
extract(this.getChildren());
return;
}
}
handleChildrens() {
const {children} = this.props;
const {overwrite} = this.props;
const children = this.getChildren();

if (this.context.extract){
return;
Expand All @@ -61,26 +70,34 @@ class MetaTags extends Component {
const head = document.head;
const headHtml = head.innerHTML;

//filter children remove if children has not been changed
childNodes = childNodes.filter((child) => {
return headHtml.indexOf(getDomAsString(child)) === -1;
});

//remove title and elements from head tag having same id
childNodes.forEach((child) => {
const elemInHead = !!child.id && head.querySelector('#' + child.id);
if (elemInHead) {
head.removeChild(elemInHead);
}

//remove title always
if(!elemInHead && child.tagName === 'TITLE'){
const title = head.querySelector('title');
if(title) {
head.removeChild(title);
if(overwrite) {
const nodes = Array.prototype.slice.call(head.querySelectorAll('[data-source=react-meta-tags]'));

nodes.forEach((node) => {
head.removeChild(node)
});
} else {
//filter children remove if children has not been changed
childNodes = childNodes.filter((child) => {
return headHtml.indexOf(getDomAsString(child)) === -1;
});

//remove title and elements from head tag having same id
childNodes.forEach((child) => {
const elemInHead = !!child.id && head.querySelector('#' + child.id);
if (elemInHead) {
head.removeChild(elemInHead);
}
}
});

//remove title always
if(!elemInHead && child.tagName === 'TITLE'){
const title = head.querySelector('title');
if(title) {
head.removeChild(title);
}
}
});
}

appendChild(document.head, childNodes);
}
Expand Down