Question

If I have content preloaded in textarea then I have new lines converted to “br” tags.

But if I try to set content dynamically (not pasting) to tinymce textarea by using its setContent function new lines are missing.

I use v.3.4.7, tried v.3.5.6 (the latest by far) and it removes new lines even on page loading.

<script type="text/javascript">
    tinyMCE.init({
        mode: "textareas",
        editor_selector: "EmailBody",
        theme: "advanced",
        language: "en",
        charLimit: 10,
        plugins: "table,advhr,advlink,insertdatetime,preview,print,contextmenu,paste,directionality",
        theme_advanced_buttons1_add: "fontselect,fontsizeselect",
        theme_advanced_buttons2_add: "separator,insertdate,inserttime,preview,zoom,separator,forecolor,backcolor",
        theme_advanced_buttons2_add_before: "pastetext,pasteword,separator",
        theme_advanced_buttons3_add_before: "tablecontrols,separator",
        theme_advanced_buttons3_add: "advhr,separator,ltr,rtl,separator",
        theme_advanced_toolbar_location: "top",
        theme_advanced_toolbar_align: "left",
        theme_advanced_statusbar_location: "bottom",
        plugi2n_insertdate_dateFormat: "%Y-%m-%d",
        plugi2n_insertdate_timeFormat: "%H:%M:%S",
        paste_use_dialog: false,
        theme_advanced_resizing: false,
        theme_advanced_resize_horizontal: true,
        paste_auto_cleanup_on_paste: true,
        paste_convert_headers_to_strong: false,
        paste_remove_spans: true,
        width: "100%",
        paste_remove_styles: true,
        valid_elements: "a[href|target=_blank],strong/b,div[align],p,br,i,u",
        content_css: "/css/tinymce_bigger_default_font.css",
        forced_root_block: false,
        force_br_newlines: true,
        force_p_newlines: false,
        apply_source_formatting: false,
        remove_linebreaks: false,
        convert_newlines_to_brs: true
    });
</script>

function Click()
{
    var text = document.getElementById("preText").innerText;
    tinyMCE.activeEditor.setContent(text);
}

<pre id="preText">Text

Text
</pre>

The result must be as follows:

Text

Text

But instead I get:

TextText

Answer 1

How to replace new lines to break lines on initial content set:

convert_newlines_to_brs and remove_linebreaks parameters have been removed from tinymce (check your tinymce source code).

To restore convert_newlines_to_brs functionality use this code (it was taken from previous version of tinymce):

tinyMCE.init({
    setup : function(ed) {
        ed.onBeforeSetContent.add(function(ed, o) {
            if (o.initial) {
                o.content = o.content.replace(/\r?\n/g, '<br />');
            }
        });
    }
});