[JavaScript] jSignature.min.js 사용하여 전자 서명 기능 개발

jSignature는 브라우저 창에서 서명 캡처 필드 생성을 단순화하여 사용자가 마우스,

펜 또는 손가락을 사용하여 서명을 그릴 수 있도록 하는 JavaScript 위젯(jQuery 플러그인)

<script src="https://cdn.cdnhub.io/jSignature/2.1.3/jSignature.min.js"></script>

 

html 소스 

<div class="f_name_area">
    <ul>
        <li>
            <p class="name" >팀원 0 : <span id="signNm1"></span> </p>
            <button type="button" class= "sign_button" onclick="openSignatureModal('signNm1', '1', this); ">
                <label for="name1">
                    <span>서명</span>
                    <img src="" id="signNm1_img" class="signature-img" alt="">
                </label>
            </button>
            <button style="display:none;" type="button" onclick="deleteSignature('signNm1', '1', this);" class="sign_Delbutton" id="signNm1_del"><img src="/images/common/ico_close.svg" alt="서명 삭제"></button>
        </li>
        <li>
            <p class="name" >팀원 1 : <span id="signNm2"></span> </p>
            <button type="button" class= "sign_button" onclick="openSignatureModal('signNm2', '2', this); ">
                <label for="name1">
                    <span>서명</span>
                    <img src="" id="signNm2_img"  class="signature-img" alt="">
                </label>
            </button>
            <button style="display:none;" type="button" onclick="deleteSignature('signNm2', '1', this);" class="sign_Delbutton" id="signNm2_del"><img src="/images/common/ico_close.svg" alt="서명 삭제"></button>
        </li>
        <li>
            <p class="name" >팀원 2 : <span id="signNm3"></span> </p>
            <button type="button" class= "sign_button" onclick="openSignatureModal('signNm3', '3', this); ">
                <label for="name1">
                    <span>서명</span>
                    <img src="" id="signNm3_img"  class="signature-img" alt="">
                </label>
            </button>
            <button style="display:none;" type="button" onclick="deleteSignature('signNm3', '1', this);" class="sign_Delbutton" id="signNm3_del"><img src="/images/common/ico_close.svg" alt="서명 삭제"></button>
        </li>
        <li>
            <p class="name" >팀원 3 : <span id="signNm4"></span> </p>
            <button type="button" class= "sign_button" onclick="openSignatureModal('signNm4', '4', this); ">
                <label for="name1">
                    <span>서명</span>
                    <img src="" id="signNm4_img"  class="signature-img" alt="">
                </label>
            </button>
            <button style="display:none;" type="button" onclick="deleteSignature('signNm4', '1', this);" class="sign_Delbutton" id="signNm4_del"><img src="/images/common/ico_close.svg" alt="서명 삭제"></button>
        </li>
        <li>
            <p class="name" >팀원 4 : <span id="signNm5"></span> </p>
            <button type="button" class= "sign_button" onclick="openSignatureModal('signNm5', '5', this); ">
                <label for="name1">
                    <span>서명</span>
                    <img src="" id="signNm5_img"  class="signature-img" alt="">
                </label>
            </button>
            <button style="display:none;" type="button" onclick="deleteSignature('signNm5', '1', this);" class="sign_Delbutton" id="signNm5_del"><img src="/images/common/ico_close.svg" alt="서명 삭제"></button>
        </li>
    </ul>		
</div>


<div class="layer_wrap" style="display: none;">
	<div class="layer_popup">
		<div class="popup_header">
			<div class="title_wrap">
				<h3>서명란 : 마우스로 입력하세요.</h3>
			</div>
		</div>
		<div class="popup_con">
			<div id="signatureparent">
				  <div id="signature"></div>	
				  <div class="btn_wrap">	
				 	  <button onclick="saveSignature(); return false;" class="btn btn_a">저장</button>	
					  <button onclick="closeSignature(); return false;" class="btn btn_b">닫기</button>
				  </div>
			</div>
		</div>
	</div>
</div>

 

js 소스 

var currentSignId; 
var currentNum; 

// 서명 모달 열기 함수
function openSignatureModal(spanId, num, clickedButton) {
    // 다른 버튼은 비활성화
    var buttons = document.querySelectorAll('.sign_button');
    buttons.forEach(function(button) {
        if (button !== clickedButton) {
            button.disabled = true;
        }
    });
    
    $("#signatureparent").show();
    $(".layer_wrap").css("display","flex");

    // 이미지가 비어있는 경우  초기화
    if ($("#" + spanId + "_img").attr("src") == '') {
        $("#signature").jSignature({"decor-color": "transparent"});
    } else {
        clearSignature(); 
        $("#signature").jSignature({"decor-color": "transparent"});
    }

    currentSignId = spanId; // 현재  ID 설정
    currentNum = num;       // 현재 숫자 설정
}

// sign 관련 버튼 활성화
function button_disabled_false() {
    var buttons = document.querySelectorAll('.sign_button');
    buttons.forEach(function(button) {
        button.disabled = false;
    });
}

function saveSignature() {
    // 서명 데이터 가져오기
    var data = $("#signature").jSignature("getData", "image");
    var imgSrc = "data:" + data[0] + "," + data[1];
    // ** 이미지 소스 설정
    $("#" + currentSignId + "_img").attr("src", imgSrc);
    
	$("#" + currentSignId +"_del").css("display", "block");
	
    $("#signatureparent").hide();
    $(".layer_wrap").hide();
    removeSignature();       
    button_disabled_false(); // 모든 버튼 활성화
}

function deleteSignature(spanId, num, clickedButton) {
    $("#"+ spanId +"_img").attr("src","");
	$("#" + spanId +"_del").css("display", "none");
}

function removeSignature() { 
    if (currentNum >= 0) {
        for (var i = 0; i < currentNum.length; i++) {
            $("#signature .jSignature")[i].remove();
        }
    }
}

function clearSignature() {
    for (var i = 1; i < $("#signature .jSignature").length; i++) {
        $("#signature .jSignature")[i].remove();
    }
}

function closeSignature() {
    $("#signatureparent").hide();
    $(".layer_wrap").hide();
    removeSignature();        
    button_disabled_false();
}