How to check the contents of append to URLSearchParams?

how to check things from append to URLSearchParams

Jul.21,2021

get ("key")

var params = new URLSearchParams()
params.append("name","123")
params.append("age","111")

console.log(params.get("name"))   //

for(var value of params.values()) {
  console.log(value);   //
}

for(var value of params.keys()) {
  console.log(value);   //key  
}
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