prompt and display on Chrome: not showing output of prompt incrementally

[martin-henz]

Bug shows up on Chrome. Firefox: OK. Here is the test case:

function prompt_loop() {
    const input = prompt("enter here:");
    if (input === null) {
        return null;
    } else {
        display(input);
        prompt_loop();
    }
}
prompt_loop();

[martin-henz]

(use Source §3)