<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> </head> <style> button:hover , button:focus , button:focus-visible , button:focus-within , button:target , button:active , button:visited { border: 4px solid #008cff; } .empty_input { border: 2px solid #ff0000; } .outer_div { width: 100%; height: 100vh; display: flex; align-items: center; justify-content: center; background: #00000066; } .inner_div { max-width: 400px; width: 100%; } .clampForm input { /* width: 100%; */ } .clampForm { overflow: hidden; } input, p, button, label, select { width: 100%; display: block; font-size: 20px; border: 4px solid #008cff00; } button.click_to_calculate { /* max-width: 210px; */ } body { margin: 0; padding: 0; } .value_output p { margin: 0; } </style> <body> <div class="outer_div"> <div class="inner_div"> <div class="clampForm" name="clampForm"> <div class="most-pg-size"> <form action=""> <label for="cars">Most Page Width Sizes:</label> <select id="select_scr_size" name="screen sizes"> <option value="Select">Select</option> <option value="1920">1920</option> <option value="1728">1728</option> <option value="1600">1600</option> <option value="1536">1536</option> <option value="1440">1440</option> <option value="1366">1366</option> <option value="1280">1280</option> <option value="1024">1024</option> <option value="992">992</option> <option value="767">767</option> </select> </form> </div> <p>Max Page Width Size <input class="form-control" for="number" id="max_screen_size" type="number"></p> <p>Maximum Size <input class="form-control" name="number" id="max_value" type="number"></p> <p>Minimum Size <input class="form-control" id="min_value" type="number"></p> <p>Line Height <input class="form-control" id="lineheight_value" type="number"></p> <button type="button" class="click_to_calculate" id="click_to_calculate" onclick="executeFunctions()">Click To Calculate</button> <div class="result"> <div id="value_output" class="value_output"></div> </div> </div> </div> </div> <script> var select_scr_size = document.getElementById("select_scr_size").value; document.getElementById("max_screen_size").placeholder = select_scr_size; var sel_opt_vl = document.getElementById('select_scr_size'); sel_opt_vl.addEventListener("change", sel_opt_vlFn); function sel_opt_vlFn() { document.getElementById("max_screen_size").value = sel_opt_vl.value; } function displayMessage(){ let max_screen_size = document.querySelector("#max_screen_size").value; let max_value = document.querySelector("#max_value").value; let min_value = document.querySelector("#min_value").value; var line_heigh_val = document.getElementById("lineheight_value").value; var line_heigh_per = line_heigh_val / max_value * 100 ; // Check if input field is empty if (max_screen_size === "") { document.querySelector("#max_screen_size").classList.add("empty_input"); return false; } else { document.querySelector("#max_screen_size").classList.remove("empty_input"); } if (max_value === "") { document.querySelector("#max_value").classList.add("empty_input"); return false; } else { document.querySelector("#max_value").classList.remove("empty_input"); } if (min_value === "" ) { document.querySelector("#min_value").classList.add("empty_input"); document.querySelector("#min_value").value = ''; document.getElementById("value_output").innerText = ""; return false; } else { document.querySelector("#min_value").classList.remove("empty_input"); } let vw_value = (max_value* 100 / max_screen_size) ; function addOneToDecimal(num) { var decimalPart = num % 1; var roundedDecimal = decimalPart.toFixed(2); if (roundedDecimal.charAt(3) === '0') { num += 0.01; } return num; } var result = addOneToDecimal(vw_value); vw_value = result.toFixed(2); let value_output = `<div><p>font-size : clamp(${min_value}px,${vw_value}vw,${max_value}px); </p> <p> line-height : ${line_heigh_per}%;</p></div>`; document.querySelector("#value_output").innerHTML = value_output; } // click to copy function function copyText() { var text = document.getElementById("value_output").innerText; var textarea = document.createElement("textarea"); textarea.value = text; document.body.appendChild(textarea); textarea.select(); document.execCommand("copy"); document.body.removeChild(textarea); } function executeFunctions() { displayMessage() copyText() } </script> </body> </html> <!-- <script> function displayMessage(){ let max_screen_size = document.querySelector("#max_screen_size").value; let max_value = document.querySelector("#max_value").value; let min_value = document.querySelector("#min_value").value; let vw_value = (max_value* 100 / max_screen_size) ; function addOneToDecimal(num) { var decimalPart = num % 1; var roundedDecimal = decimalPart.toFixed(2); if (roundedDecimal.charAt(3) === '0') { num += 0.01; } return num; } var result = addOneToDecimal(vw_value); vw_value = result.toFixed(2); let value_output = `clamp(${min_value}px,${vw_value}vw,${max_value}px);`; console.log(value_output); document.querySelector("#value_output").innerHTML = value_output; } // click to copy function function copyText() { var text = document.getElementById("value_output").innerText; var textarea = document.createElement("textarea"); textarea.value = text; document.body.appendChild(textarea); textarea.select(); document.execCommand("copy"); document.body.removeChild(textarea); } function executeFunctions() { displayMessage() copyText() } </script> --> <!-- Discover, Shop, Transform: Your Home Essentials Unleash Your Style: Shop and Transform. 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