js在线检测打字速度和输入字符准确性实用工具

使用方法

const testWrapper = document.querySelector(".test-wrapper");
const testArea = document.querySelector("#test-area");
const originText = document.querySelector("#origin-text p").innerHTML;
const resetButton = document.querySelector("#reset");
const theTimer = document.querySelector(".timer");


var timer = [0,0,0,0];
var interval;
var timerRunning = false;

// Add leading zero to numbers 9 or below (purely for aesthetics):
function leadingZero(time) {
    
    if (time <= 9) {
        
        time = "0" + time;
    }
    
    return time;
}

// Run a standard minute/second/hundredths timer:
function runTimer() {
    
    let currentTime = leadingZero(timer[0]) + ":" + leadingZero(timer[1]) + ":" + leadingZero(timer[2]);
    
    theTimer.innerHTML = currentTime;
    timer[3]++;
    
    timer[0] = Math.floor((timer[3]/100)/60);
    timer[1] = Math.floor((timer[3]/100) - (timer[0] * 60));
    timer[2] = Math.floor(timer[3] - (timer[1] * 100) - (timer[0] * 6000));
}

// Match the text entered with the provided text on the page:
function spellCheck() {
    
    let textEntered = testArea.value;
    let originTextMatch = originText.substring(0, textEntered.length);
    
    if(textEntered == originText) {
        
        clearInterval(interval);
        
        testWrapper.style.borderColor = "#339900";
        
    } else {
        
        if(textEntered  == originTextMatch) {
            
            testWrapper.style.borderColor = "#E55400";
        } else {
            
            testWrapper.style.borderColor = "#FF0000";
        }
    }
    
}

// Start the timer:
function start() {
    
    let textEnteredLength = testArea.value.length;
    
    if (textEnteredLength === 0 && !timerRunning ){
        
        timerRunning = true;
        interval = setInterval(runTimer, 10);
    }
    
    console.log(textEnteredLength);
}

// Reset everything:
function reset() {
    
    clearInterval(interval);
    interval = null;
    
    timer = [0,0,0,0];
    timerRunning = false;
    
    testArea.value = "";
    theTimer.innerHTML = "00:00:00";
    testWrapper.style.borderColor = "grey";
}


// Event listeners for keyboard input and the reset button:
testArea.addEventListener("keypress", start, false);
testArea.addEventListener("keyup", spellCheck, false );
resetButton.addEventListener("click", reset, false);