this.$route.query.keyword.split(",")[this.$route.query.keyword.split(",").length - 1]
this.$route.query.keyword.split(",")[this.$route.query.keyword.split(",").length - 1] for example, there is a url link: xxxx.com/path?keyword=a,b,c,d,e
this code takes keyword corresponding value a code divides the last item of the array by comma, that is, e
add a variable to make it clearer
const args = this.$route.query.keyword.split(','); // keyword
args[args.length-1]; // get the last value of the comma in the keyword parameter of the current link
take the last value in the array converted by keyword
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