I have select many data and post to back end, it is succeed but after that i want to delete array data in front end without reload. I try with splice it is only delete one or two max is tow

Here is my code

const itemOrder = this.baskets.filter((el)=>{
    return el.checkbox == true
});

HTTP().post('/order',itemOrder).then(()=>{
});

after then i wont to delete all this baskets if checkbox is true

i have try

for(let i in this.baskets) {
    if(this.baskets[i].checkbox == true) {
        console.log(i);
        this.baskets.splice(i,1);
    }
}

and also try this

this.baskets.splice(this.baskets.findIndex(e => e.checkbox == true),1);

still does not work as my expectation