[Vuejs]-VueJs – Need to bring a linear progress bar when a record is saved

<v-progress-linear v-if=true indeterminate></v-progress-linear>

Try changing the prop indeterminate as in snippet. The progress bar display depends on V-if evaluation. If Your v-if results in true, the progress bar will be displayed and will have continuously animation of progress.
If v-if results in false you will not see the progress bar . So set v-if when save is complete (may be once you get a signal from backend if you have set up that way).