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View Code? Open in Web Editor NEWESLint plugin for preventing memory leaks around observers (ResizeObserver, IntersectionObserver, MutationObserver)
ESLint plugin for preventing memory leaks around observers (ResizeObserver, IntersectionObserver, MutationObserver)
When you create the observer in a variable and later on assign it to another variable or property, the eslint rule doesn't recognize that the second variable contains the observer and doesn't take into account the unobserve
or disconnect
executed by the second variable or property.
Code to reproduce
class MyComponent extends React.Component {
resizeObserver = null;
resizeElement = createRef();
componentDidMount() {
const temp = new ResizeObserver((entries) => {
// do things
});
temp.observe(this.resizeElement.current);
this.resizeObserver = temp
}
componentWillUnmount() {
if (this.resizeObserver) {
this.resizeObserver.unobserve(this.resizeElement.current);
}
}
render() {
return (
<div ref={this.resizeElement}>
...
</div>
);
}
}
temp does not have a corresponding Unobserve or Disconnnect
It shouldn't throw the error
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