CODEWITHSUNDEEP
javascripthtmljsonunicode
asissuthar
asissuthar

Reputation: 2256

Unable to display emoji from unicode JSON response

<!DOCTYPE html>
<html>
<head>
    <title>WeekAPI</title>
    <meta charset="utf-8">
</head>
<body>
    Tag Value from Variable
    <h1 id="txtDisplay">Please Wait..</h1>

    Tag Value from API
    <h1 id="txtResponse">Please Wait..<h1>

    <script type="text/javascript" src="https://code.jquery.com/jquery-1.12.4.min.js"></script>

    <script>

        var tag_value = "\uD83D\uDE05\uD83D\uDE00\uD83D\uDE02\uD83D\uDE2C\uD83D\uDE10\uD83D\uDE0E";

        $("#txtDisplay").html(tag_value);


        var api = "http://week.esy.es/api?id=140393107018&institute=039&branch=07&semester=7&callback=?";

        $.getJSON(api, function(data) {
            //response tag value is same as tag_value variable
            $("#txtResponse").html(data.schedule.friday[0].tag);
        });   
    </script>
</body>
</html>

API Response data

{
  "ok": true,
  "message": "Successful.",
  "schedule": {
    "monday": [
      {
        "type": "lecture",
        "_id": 2,
        "start": "11:32 AM",
        "end": "11:32 AM",
        "teacher": "KPP",
        "subject": "Compiler Design",
        "tag": ""
      }
    ],
    "tuesday": [],
    "wednesday": [],
    "thursday": [],
    "friday": [
      {
        "type": "holiday",
        "_id": 2,
        "start": "09:30 AM",
        "end": "10:21 AM",
        "name": "\\u0928\\u0935\\u0930\\u093E\\u0924\\u094D\\u0930\\u093F",
        "tag": "\\uD83D\\uDE05\\uD83D\\uDE00\\uD83D\\uDE02\\uD83D\\uDE2C\\uD83D\\uDE10\\uD83D\\uDE0E"
      }
    ],
    "saturday": [],
    "sunday": []
  }
}

WeekAPI output

1st scenario

unicode value of emoji stored into tag_value variable

display using $("#txtDisplay").html(tag_value); in txtDisplay portion.

it works fine

but when

2nd scenario retrieve tag value from api (value same as above)

display using $("#txtResponse").html(data.schedule.friday[0].tag); in txtResponse portion.

it is fails to display emoji. it is display text instead.

Upvotes: 3

Views: 3811

Answers (1)

asissuthar
asissuthar

Reputation: 2256

Got the solution after understand internal work of javascript.

javascript interpret unicode only when unicode string hardcoded between quotes.

so i used eval function and created below code snippet to interpret unicode data runtime.

function interpret(s) {
    return eval("(function(){ return '" + s + "'})()");
}  

$.getJSON(api, function(data) {
    $("#txtResponse").html( interpret( data.schedule.friday[0].tag ) );
});

Found another solution

at server side just added str_replace function before printing response to replace \\ with \ in json 

$response = json_encode($result);

echo str_replace( '\\\\' , '\\' , $response);

at client side 

$.getJSON(api, function(data) {
    $("#txtResponse").html( data.schedule.friday[0].tag );
});

Upvotes: 4

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