js的随机密码生成试验

随机字符生成器其实在我们的生活当中运用的很广泛，比如密码保管器、重置密码的链接、身份验证的链接等等，所以今天我就尝试了一下如何使用js来生成随机字符~

体验

学习了一下如何使用js来生成随机字符，欢迎体验啦~

请您放心，我们不会记录您生成的字符。

出现异常？点击传送门来体验吧！

原理

让我们一起来看看，这个js是如何实现的功能吧！

    // Clear the concole on every refresh
    console.clear();
    
    // Range Slider Properties.
    // Fill : The trailing color that you see when you drag the slider.
    // background : Default Range Slider Background
    const sliderProps = {
        fill: "#0B1EDF",
        background: "rgba(255, 255, 255, 0.214)",
    };
    
    // Selecting the Range Slider container which will effect the LENGTH property of the password.
    const slider = document.querySelector(".range__slider");
    
    // Text which will show the value of the range slider.
    const sliderValue = document.querySelector(".length__title");
    
    // Using Event Listener to apply the fill and also change the value of the text.
    slider.querySelector("input").addEventListener("input", event => {
        sliderValue.setAttribute("data-length", event.target.value);
        applyFill(event.target);
    });
    // Selecting the range input and passing it in the applyFill func.
    applyFill(slider.querySelector("input"));
    // This function is responsible to create the trailing color and setting the fill.
    function applyFill(slider) {
        const percentage = (100 * (slider.value - slider.min)) / (slider.max - slider.min);
        const bg = `linear-gradient(90deg, ${sliderProps.fill} ${percentage}%, ${sliderProps.background} ${percentage +
            0.1}%)`;
        slider.style.background = bg;
        sliderValue.setAttribute("data-length", slider.value);
    }
    
    // Object of all the function names that we will use to create random letters of password
    const randomFunc = {
        lower: getRandomLower,
        upper: getRandomUpper,
        number: getRandomNumber,
        symbol: getRandomSymbol,
    };
    
    // Generator Functions
    // All the functions that are responsible to return a random value taht we will use to create password.
    function getRandomLower() {
        return String.fromCharCode(Math.floor(Math.random() * 26) + 97);
    }
    function getRandomUpper() {
        return String.fromCharCode(Math.floor(Math.random() * 26) + 65);
    }
    function getRandomNumber() {
        return String.fromCharCode(Math.floor(Math.random() * 10) + 48);
    }
    function getRandomSymbol() {
        const symbols = '~!@#$%^&*()_+{}":?><;.,';
        return symbols[Math.floor(Math.random() * symbols.length)];
    }
    
    // Selecting all the DOM Elements that are necessary -->
    
    // The Viewbox where the result will be shown
    const resultEl = document.getElementById("result");
    // The input slider, will use to change the length of the password
    const lengthEl = document.getElementById("slider");
    
    // Checkboxes representing the options that is responsible to create differnt type of password based on user
    const uppercaseEl = document.getElementById("uppercase");
    const lowercaseEl = document.getElementById("lowercase");
    const numberEl = document.getElementById("number");
    const symbolEl = document.getElementById("symbol");
    
    // Button to generate the password
    const generateBtn = document.getElementById("generate");
    // Button to copy the text
    const copyBtn = document.getElementById("copy-btn");
    // Result viewbox container
    const resultContainer = document.querySelector(".result");
    // Text info showed after generate button is clicked
    const copyInfo = document.querySelector(".result__info.right");
    // Text appear after copy button is clicked
    const copiedInfo = document.querySelector(".result__info.left");
    
    // Update Css Props of the COPY button
    // Getting the bounds of the result viewbox container
    let resultContainerBound = {
        left: resultContainer.getBoundingClientRect().left,
        top: resultContainer.getBoundingClientRect().top,
    };
    // This will update the position of the copy button based on mouse Position
    resultContainer.addEventListener("mousemove", e => {
        copyBtn.style.setProperty("--x", `${e.x - resultContainerBound.left}px`);
        copyBtn.style.setProperty("--y", `${e.y - resultContainerBound.top}px`);
    });
    window.addEventListener("resize", e => {
        resultContainerBound = {
            left: resultContainer.getBoundingClientRect().left,
            top: resultContainer.getBoundingClientRect().top,
        };
    });
    
    // Copy Password in clipboard
    copyBtn.addEventListener("click", () => {
        const textarea = document.createElement("textarea");
        const password = resultEl.innerText;
        if (!password || password == "CLICK GENERATE") {
            return;
        }
        textarea.value = password;
        document.body.appendChild(textarea);
        textarea.select();
        document.execCommand("copy");
        textarea.remove();
    
        copyInfo.style.transform = "translateY(200%)";
        copyInfo.style.opacity = "0";
        copiedInfo.style.transform = "translateY(0%)";
        copiedInfo.style.opacity = "0.75";
    });
    
    // When Generate is clicked Password id generated.
    generateBtn.addEventListener("click", () => {
        const length = +lengthEl.value;
        const hasLower = lowercaseEl.checked;
        const hasUpper = uppercaseEl.checked;
        const hasNumber = numberEl.checked;
        const hasSymbol = symbolEl.checked;
        resultEl.innerText = generatePassword(length, hasLower, hasUpper, hasNumber, hasSymbol);
        copyInfo.style.transform = "translateY(0%)";
        copyInfo.style.opacity = "0.75";
        copiedInfo.style.transform = "translateY(200%)";
        copiedInfo.style.opacity = "0";
    });
    
    // Function responsible to generate password and then returning it.
    function generatePassword(length, lower, upper, number, symbol) {
        let generatedPassword = "";
        const typesCount = lower + upper + number + symbol;
        const typesArr = [{ lower }, { upper }, { number }, { symbol }].filter(item => Object.values(item)[0]);
        if (typesCount === 0) {
            return "";
        }
        for (let i = 0; i < length; i++) {
            typesArr.forEach(type => {
                const funcName = Object.keys(type)[0];
                generatedPassword += randomFunc[funcName]();
            });
        }
        return generatedPassword.slice(0, length);
    }

最后

感谢你的阅读qwq