Is there a way to incorporate a JavaScript variable into an error message while maintaining a single font ID tag?

Initially, my form displays an error message that functions correctly. I have now encountered a dilemma while attempting to customize this error message based on user input gathered earlier in the form:

if (thing is true) {
    $(this).parents("table:first")
    .prop("disabled",true)
    .css({'background-color' : 'lightgray'})
    .after("<font color = red id=error3><strong>*</strong> Please check that your start and end dates are between June 15, 2018 and November 30, 2019. The Start Date may not be greater than the End Date.</font>");
}

I aim to modify the error message by integrating dates provided by the user in previous sections of the form. Despite using concatenation, I am faced with the following challenge:

if (thing is true) {
    // example dates provided by user
    cysd = $("#id_currentyearstartdate").val();
    cyed = $("#id_currentyearenddate").val();
    // assuming cysd is January 1, 2018 and cyed is December 31, 2018

    $("input#next-submit-button")
    .prop("disabled",true)
    .css({'background-color' : 'lightgray'})
    .after("<font color = red id=error2><br>Please resolve any errors above before continuing. <br><strong>*</strong> Check that your start and end dates are between </font>" + cysd + "<font color = red id=error2> and </font>" + cyed + "<font color = red id=error2>. The Start Date may not be greater than the End Date.</font>");

The issue arises from the fact that the original error message contained only one message under the font ID "error2," allowing easy additions or removals based on specific conditions.

I am struggling to incorporate the variable values within the actual text of the error message or the font tag itself. This way, when id=error2 is referenced, it encompasses the entire statement "Please check that your start and end dates are between January 1, 2018 and December 31, 2018. The Start Date may not be greater than the End Date."

javascriptjqueryhtmlcss

Answer №1

Place it within the same tag...

.after("<font color = red id=error2><br>Please make sure to address any errors above before proceeding. <br><strong>*</strong> Ensure that your start and end dates fall between " + cysd + ". The Start Date cannot be later than the End Date.</font>");

You also have the option to utilize template literals instead of concatenation, which is simpler as you don't need to worry about mixing quotation marks. Enclose your string in backticks (`) and place your variables in curly braces preceded by a $.

.after(`<font color = red id=error2><br>Please make sure to address any errors above before proceeding. <br><strong>*</strong> Ensure that your start and end dates are between ${cysd}. The Start Date cannot be later than the End Date.</font>`);

Regardless, avoid using font tags - they are considered outdated. Opt for CSS and span tags instead.

.after(`<span style=color:red id=error2><br>Please make sure to address any errors above before proceeding. <br><strong>*</strong> Ensure that your start and end dates are between ${cysd}. The Start Date cannot be later than the End Date.</span>`);

Answer №2

Utilizing a Template Literal allows you to insert variable values into your strings using the dollar sign and curly braces. For example: ${cysd}

$("input#next-submit-button")
.prop("disabled",true)
.css({'background-color' : 'lightgray'})
.after(`<font color="red" id="error2"><br>Please resolve any errors above before continuing. <br><strong>*</strong> Verify that your start and end dates fall within ${cysd} and ${cyed}. The Start Date should not exceed the End Date.</font>`);

Answer №3

One way to enhance the message presentation is by enclosing the entire content in a div labeled as id="error2":

<style>
    #error2 {
        color: 'red'
    }

    .error_date {
        color: 'blue'
    }
</style>

$("input#submit-button")
    .prop("disabled",true)
    .after("<div id='error2'>" +
        "Please address any errors above before proceeding.<br/>" +
        "<strong>*</strong> Ensure your start and end dates fall between <span class='error_date'>" + cysd + "</span> and <span class='error_date'>" + cyed + "</span>." +
        "The Start Date should not exceed the End Date.</div>");

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