Currently, I am trying to make modifications to the CSS rules of an <h1> element with a reference ref="header". However, I have encountered a TypeScript error that is preventing me from doing so.
const header = ref<HTMLElement | null>(null)
onMounted(() => {
header.value.style.color = "red"
})
The issue is quite understandable: there is no guarantee that the element actually exists.
If the element is not present, the template ref's value will be null.
It clearly states in the type for the ref: HTMLElement | null.
To address this, you can modify your onMounted callback like so:
onMounted(() => {
if (header.value)
header.value.style.color = "blue"
})
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