Utilizing vue-material.io for my project, specifically the datepicker component.
Encountering an issue with state observation.
Noticing that the watcher is triggering twice. Is this a bug in the package or inherent to Vue?
Steps to Replicate:
Attempt to select a date and monitor the console output.
You'll notice that it triggers unexpectedly twice.
It seems like the repetitive triggering of the watcher in the component is causing this issue. When the date is modified by a click, the data is updated and emitted. Subsequently, the internal watcher interprets this change, formats the data, and emits it again. This results in the watcher being activated twice.
Although the behavior may seem peculiar, it is actually functioning as designed.
For further insights, you can review the source code at: https://github.com/vuematerial/vue-material/blob/dev/src/components/MdDatepicker/MdDatepicker.vue
One approach is to assess the difference between oldVal and newVal, triggering an event only when there is a change in value
watch: {
selectedDate(newVal, oldVal) {
if (!newVal || !oldVal || newVal.getTime() !== oldVal.getTime()) {
console.log(`this is ${newVal}`);
}
}
}
To verify, you can use the following method:
if (!value || `${value.getHours()}${value.getMinutes()}${value.getSeconds()}` === '000') {
// place your code here
console.log(`the value is ${value}`);
}
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