gistfile1.txt

// MIT LICENSE

let x = document.querySelector("[data-testid='SearchBox_Search_Input']"); x.addEventListener('keyup', (e) => {
    if(e.target.value.includes("from:")) {
        e.target.value = e.target.value.split("from:").join("")
        let parent = e.target.parentElement
        let div = document.createElement("div");
        div.innerText= "From:"
        parent.prepend(div)
        div.style['padding'] = '5px 10px'
        div.style['background'] = 'rgb(223 223 223)'
        div.style['height'] = '15px'
        div.style['border-radius'] = '10px'
        div.style['margin-top'] = '5px'
        div.style['padding-bottom'] = '10px'
    }
});